57768391 has 2 divisors, whose sum is σ = 57768392. Its totient is φ = 57768390.

The previous prime is 57768383. The next prime is 57768401. The reversal of 57768391 is 19386775.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57768391 - 2³ = 57768383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57768691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28884195 + 28884196.

It is an arithmetic number, because the mean of its divisors is an integer number (28884196).

Almost surely, 2^57768391 is an apocalyptic number.

57768391 is a deficient number, since it is larger than the sum of its proper divisors (1).

57768391 is an equidigital number, since it uses as much as digits as its factorization.

57768391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 46.

The square root of 57768391 is about 7600.5520194260. The cubic root of 57768391 is about 386.5717296485.

The spelling of 57768391 in words is "fifty-seven million, seven hundred sixty-eight thousand, three hundred ninety-one".