57921717 has 16 divisors (see below), whose sum is σ = 88901120. Its totient is φ = 32858352.

The previous prime is 57921697. The next prime is 57921767. The reversal of 57921717 is 71712975.

It is not a de Polignac number, because 57921717 - 2¹¹ = 57919669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57921767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7003 + ... + 12840.

It is an arithmetic number, because the mean of its divisors is an integer number (5556320).

Almost surely, 2^57921717 is an apocalyptic number.

It is an amenable number.

57921717 is a deficient number, since it is larger than the sum of its proper divisors (30979403).

57921717 is a wasteful number, since it uses less digits than its factorization.

57921717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19992.

The product of its digits is 30870, while the sum is 39.

The square root of 57921717 is about 7610.6318397358. The cubic root of 57921717 is about 386.9134340228.

The spelling of 57921717 in words is "fifty-seven million, nine hundred twenty-one thousand, seven hundred seventeen".