57697691 has 2 divisors, whose sum is σ = 57697692. Its totient is φ = 57697690.

The previous prime is 57697681. The next prime is 57697697. The reversal of 57697691 is 19679675.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57697691 - 2¹⁴ = 57681307 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57697697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28848845 + 28848846.

It is an arithmetic number, because the mean of its divisors is an integer number (28848846).

Almost surely, 2^57697691 is an apocalyptic number.

57697691 is a deficient number, since it is larger than the sum of its proper divisors (1).

57697691 is an equidigital number, since it uses as much as digits as its factorization.

57697691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 50.

The square root of 57697691 is about 7595.8996175568. The cubic root of 57697691 is about 386.4139629878.

The spelling of 57697691 in words is "fifty-seven million, six hundred ninety-seven thousand, six hundred ninety-one".