56740987 has 2 divisors, whose sum is σ = 56740988. Its totient is φ = 56740986.

The previous prime is 56740969. The next prime is 56740991. The reversal of 56740987 is 78904765.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56740987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56740927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28370493 + 28370494.

It is an arithmetic number, because the mean of its divisors is an integer number (28370494).

Almost surely, 2^56740987 is an apocalyptic number.

56740987 is a deficient number, since it is larger than the sum of its proper divisors (1).

56740987 is an equidigital number, since it uses as much as digits as its factorization.

56740987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 56740987 is about 7532.6613490851. The cubic root of 56740987 is about 384.2662970379.

The spelling of 56740987 in words is "fifty-six million, seven hundred forty thousand, nine hundred eighty-seven".