57837981 has 4 divisors (see below), whose sum is σ = 77117312. Its totient is φ = 38558652.

The previous prime is 57837937. The next prime is 57838009. The reversal of 57837981 is 18973875.

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 not a de Polignac number, because 57837981 - 2¹⁴ = 57821597 is a prime.

It is a super-2 number, since 2×57837981² = 6690464092312722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57837981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57837911) 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, 9639661 + ... + 9639666.

It is an arithmetic number, because the mean of its divisors is an integer number (19279328).

Almost surely, 2^57837981 is an apocalyptic number.

It is an amenable number.

57837981 is a deficient number, since it is larger than the sum of its proper divisors (19279331).

57837981 is a wasteful number, since it uses less digits than its factorization.

57837981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19279330.

The product of its digits is 423360, while the sum is 48.

The square root of 57837981 is about 7605.1285985182. The cubic root of 57837981 is about 386.7268936936.

The spelling of 57837981 in words is "fifty-seven million, eight hundred thirty-seven thousand, nine hundred eighty-one".