57616639 has 2 divisors, whose sum is σ = 57616640. Its totient is φ = 57616638.

The previous prime is 57616619. The next prime is 57616673. The reversal of 57616639 is 93661675.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57616639 - 2¹¹ = 57614591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57616595 and 57616604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57616609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28808319 + 28808320.

It is an arithmetic number, because the mean of its divisors is an integer number (28808320).

Almost surely, 2^57616639 is an apocalyptic number.

57616639 is a deficient number, since it is larger than the sum of its proper divisors (1).

57616639 is an equidigital number, since it uses as much as digits as its factorization.

57616639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 57616639 is about 7590.5624956257. The cubic root of 57616639 is about 386.2329372479.

The spelling of 57616639 in words is "fifty-seven million, six hundred sixteen thousand, six hundred thirty-nine".