130636779 has 16 divisors (see below), whose sum is σ = 214378752. Its totient is φ = 68907168.

The previous prime is 130636741. The next prime is 130636813. The reversal of 130636779 is 977636031.

It is not a de Polignac number, because 130636779 - 2⁸ = 130636523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130636779.

It is not an unprimeable number, because it can be changed into a prime (130636729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238989 + ... + 239534.

It is an arithmetic number, because the mean of its divisors is an integer number (13398672).

Almost surely, 2^130636779 is an apocalyptic number.

130636779 is a deficient number, since it is larger than the sum of its proper divisors (83741973).

130636779 is a wasteful number, since it uses less digits than its factorization.

130636779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478546.

The product of its (nonzero) digits is 142884, while the sum is 42.

The square root of 130636779 is about 11429.6447451353. The cubic root of 130636779 is about 507.4054815200.

The spelling of 130636779 in words is "one hundred thirty million, six hundred thirty-six thousand, seven hundred seventy-nine".