3547981 has 4 divisors (see below), whose sum is σ = 3662464. Its totient is φ = 3433500.

The previous prime is 3547963. The next prime is 3547991. The reversal of 3547981 is 1897453.

3547981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1897453 = 53 ⋅35801.

It is a cyclic number.

It is not a de Polignac number, because 3547981 - 2⁵ = 3547949 is a prime.

It is a super-2 number, since 2×3547981² = 25176338352722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3¹³ + 5⁹ + 4 + 7 + 9 + 8³ + 1 .

It is a self number, because there is not a number n which added to its sum of digits gives 3547981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3547931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57195 + ... + 57256.

It is an arithmetic number, because the mean of its divisors is an integer number (915616).

Almost surely, 2^3547981 is an apocalyptic number.

3547981 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3547981 is a deficient number, since it is larger than the sum of its proper divisors (114483).

3547981 is a wasteful number, since it uses less digits than its factorization.

3547981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114482.

The product of its digits is 30240, while the sum is 37.

The square root of 3547981 is about 1883.6085049712. The cubic root of 3547981 is about 152.5201048473.

The spelling of 3547981 in words is "three million, five hundred forty-seven thousand, nine hundred eighty-one".