4947981 has 4 divisors (see below), whose sum is σ = 6597312. Its totient is φ = 3298652.

The previous prime is 4947979. The next prime is 4947991. The reversal of 4947981 is 1897494.

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.

It is a cyclic number.

It is not a de Polignac number, because 4947981 - 2¹ = 4947979 is a prime.

It is a super-2 number, since 2×4947981² = 48965031952722, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4947991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824661 + ... + 824666.

It is an arithmetic number, because the mean of its divisors is an integer number (1649328).

Almost surely, 2^4947981 is an apocalyptic number.

It is an amenable number.

4947981 is a deficient number, since it is larger than the sum of its proper divisors (1649331).

4947981 is a wasteful number, since it uses less digits than its factorization.

4947981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649330.

The product of its digits is 72576, while the sum is 42.

The square root of 4947981 is about 2224.4057633444. The cubic root of 4947981 is about 170.4025179266.

The spelling of 4947981 in words is "four million, nine hundred forty-seven thousand, nine hundred eighty-one".