57681917 has 4 divisors (see below), whose sum is σ = 59542656. Its totient is φ = 55821180.

The previous prime is 57681893. The next prime is 57681919. The reversal of 57681917 is 71918675.

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 57681917 - 2¹⁰ = 57680893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57681919) 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, 930323 + ... + 930384.

It is an arithmetic number, because the mean of its divisors is an integer number (14885664).

Almost surely, 2^57681917 is an apocalyptic number.

It is an amenable number.

57681917 is a deficient number, since it is larger than the sum of its proper divisors (1860739).

57681917 is a wasteful number, since it uses less digits than its factorization.

57681917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860738.

The product of its digits is 105840, while the sum is 44.

The square root of 57681917 is about 7594.8612232219. The cubic root of 57681917 is about 386.3787458107.

The spelling of 57681917 in words is "fifty-seven million, six hundred eighty-one thousand, nine hundred seventeen".