136634779 has 4 divisors (see below), whose sum is σ = 139812376. Its totient is φ = 133457184.

The previous prime is 136634777. The next prime is 136634801. The reversal of 136634779 is 977436631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136634779 - 2¹ = 136634777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136634777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1588734 + ... + 1588819.

It is an arithmetic number, because the mean of its divisors is an integer number (34953094).

Almost surely, 2^136634779 is an apocalyptic number.

136634779 is a deficient number, since it is larger than the sum of its proper divisors (3177597).

136634779 is an equidigital number, since it uses as much as digits as its factorization.

136634779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177596.

The product of its digits is 571536, while the sum is 46.

The square root of 136634779 is about 11689.0880311511. The cubic root of 136634779 is about 515.0551723968.

The spelling of 136634779 in words is "one hundred thirty-six million, six hundred thirty-four thousand, seven hundred seventy-nine".