13630779 has 12 divisors (see below), whose sum is σ = 19959576. Its totient is φ = 8962272.

The previous prime is 13630769. The next prime is 13630781. The reversal of 13630779 is 97703631.

13630779 is a `hidden beast` number, since 13 + 630 + 7 + 7 + 9 = 666.

It is not a de Polignac number, because 13630779 - 2¹⁹ = 13106491 is a prime.

It is a super-2 number, since 2×13630779² = 371596272293682, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13630709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9717 + ... + 11030.

It is an arithmetic number, because the mean of its divisors is an integer number (1663298).

Almost surely, 2^13630779 is an apocalyptic number.

13630779 is a deficient number, since it is larger than the sum of its proper divisors (6328797).

13630779 is a wasteful number, since it uses less digits than its factorization.

13630779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20826 (or 20823 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 13630779 is about 3691.9884886061. The cubic root of 13630779 is about 238.8765724155.

The spelling of 13630779 in words is "thirteen million, six hundred thirty thousand, seven hundred seventy-nine".