56782987 has 2 divisors, whose sum is σ = 56782988. Its totient is φ = 56782986.

The previous prime is 56782967. The next prime is 56782993. The reversal of 56782987 is 78928765.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56782987 - 2¹¹ = 56780939 is a prime.

It is a super-2 number, since 2×56782987² = 6448615225284338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56782937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28391493 + 28391494.

It is an arithmetic number, because the mean of its divisors is an integer number (28391494).

Almost surely, 2^56782987 is an apocalyptic number.

56782987 is a deficient number, since it is larger than the sum of its proper divisors (1).

56782987 is an equidigital number, since it uses as much as digits as its factorization.

56782987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The square root of 56782987 is about 7535.4486926792. The cubic root of 56782987 is about 384.3610856840.

The spelling of 56782987 in words is "fifty-six million, seven hundred eighty-two thousand, nine hundred eighty-seven".