636982051 has 2 divisors, whose sum is σ = 636982052. Its totient is φ = 636982050.

The previous prime is 636982043. The next prime is 636982057. The reversal of 636982051 is 150289636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 636982051 - 2³ = 636982043 is a prime.

It is a super-2 number, since 2×636982051² = 811492266592333202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636981995 and 636982013.

It is not a weakly prime, because it can be changed into another prime (636982057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318491025 + 318491026.

It is an arithmetic number, because the mean of its divisors is an integer number (318491026).

Almost surely, 2^636982051 is an apocalyptic number.

636982051 is a deficient number, since it is larger than the sum of its proper divisors (1).

636982051 is an equidigital number, since it uses as much as digits as its factorization.

636982051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 636982051 is about 25238.5033431065. The cubic root of 636982051 is about 860.4171633055.

The spelling of 636982051 in words is "six hundred thirty-six million, nine hundred eighty-two thousand, fifty-one".