3499981 has 4 divisors (see below), whose sum is σ = 3620700. Its totient is φ = 3379264.

The previous prime is 3499973. The next prime is 3499999. The reversal of 3499981 is 1899943.

3499981 = T₃₁₈ + T₃₁₉ + ... + T₃₇₅.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2223081 + 1276900 = 1491^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 3499981 - 2³ = 3499973 is a prime.

It is a super-2 number, since 2×3499981² = 24499734000722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3499921) 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, 60316 + ... + 60373.

It is an arithmetic number, because the mean of its divisors is an integer number (905175).

Almost surely, 2^3499981 is an apocalyptic number.

It is an amenable number.

3499981 is a deficient number, since it is larger than the sum of its proper divisors (120719).

3499981 is a wasteful number, since it uses less digits than its factorization.

3499981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120718.

The product of its digits is 69984, while the sum is 43.

The square root of 3499981 is about 1870.8236154165. The cubic root of 3499981 is about 151.8291738543.

The spelling of 3499981 in words is "three million, four hundred ninety-nine thousand, nine hundred eighty-one".