56697287 has 2 divisors, whose sum is σ = 56697288. Its totient is φ = 56697286.

The previous prime is 56697271. The next prime is 56697307. The reversal of 56697287 is 78279665.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56697287 - 2⁴ = 56697271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56697247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28348643 + 28348644.

It is an arithmetic number, because the mean of its divisors is an integer number (28348644).

Almost surely, 2^56697287 is an apocalyptic number.

56697287 is a deficient number, since it is larger than the sum of its proper divisors (1).

56697287 is an equidigital number, since it uses as much as digits as its factorization.

56697287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 56697287 is about 7529.7600891396. The cubic root of 56697287 is about 384.1676220418.

The spelling of 56697287 in words is "fifty-six million, six hundred ninety-seven thousand, two hundred eighty-seven".