56787977 has 2 divisors, whose sum is σ = 56787978. Its totient is φ = 56787976.

The previous prime is 56787967. The next prime is 56788009. The reversal of 56787977 is 77978765.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35295481 + 21492496 = 5941^2 + 4636^2 .

It is a cyclic number.

It is not a de Polignac number, because 56787977 - 2⁴ = 56787961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56787937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28393988 + 28393989.

It is an arithmetic number, because the mean of its divisors is an integer number (28393989).

Almost surely, 2^56787977 is an apocalyptic number.

It is an amenable number.

56787977 is a deficient number, since it is larger than the sum of its proper divisors (1).

56787977 is an equidigital number, since it uses as much as digits as its factorization.

56787977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5186160, while the sum is 56.

The square root of 56787977 is about 7535.7797871222. The cubic root of 56787977 is about 384.3723443710.

The spelling of 56787977 in words is "fifty-six million, seven hundred eighty-seven thousand, nine hundred seventy-seven".