57197639 has 8 divisors (see below), whose sum is σ = 60691680. Its totient is φ = 53718016.

The previous prime is 57197633. The next prime is 57197683. The reversal of 57197639 is 93679175.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57197639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57197593 and 57197602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57197633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5207 + ... + 11895.

It is an arithmetic number, because the mean of its divisors is an integer number (7586460).

Almost surely, 2^57197639 is an apocalyptic number.

57197639 is a deficient number, since it is larger than the sum of its proper divisors (3494041).

57197639 is a wasteful number, since it uses less digits than its factorization.

57197639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209.

The product of its digits is 357210, while the sum is 47.

The square root of 57197639 is about 7562.9120714180. The cubic root of 57197639 is about 385.2944034783.

The spelling of 57197639 in words is "fifty-seven million, one hundred ninety-seven thousand, six hundred thirty-nine".