57490981 has 4 divisors (see below), whose sum is σ = 57641472. Its totient is φ = 57340492.

The previous prime is 57490967. The next prime is 57490997. The reversal of 57490981 is 18909475.

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 57490981 - 2⁹ = 57490469 is a prime.

It is a super-2 number, since 2×57490981² = 6610425792684722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57490921) 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, 74671 + ... + 75436.

It is an arithmetic number, because the mean of its divisors is an integer number (14410368).

Almost surely, 2^57490981 is an apocalyptic number.

It is an amenable number.

57490981 is a deficient number, since it is larger than the sum of its proper divisors (150491).

57490981 is a wasteful number, since it uses less digits than its factorization.

57490981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150490.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 57490981 is about 7582.2807254810. The cubic root of 57490981 is about 385.9519502236.

The spelling of 57490981 in words is "fifty-seven million, four hundred ninety thousand, nine hundred eighty-one".