136784879 has 16 divisors (see below), whose sum is σ = 170810880. Its totient is φ = 106414560.

The previous prime is 136784867. The next prime is 136784881. The reversal of 136784879 is 978487631.

It is not a de Polignac number, because 136784879 - 2⁸ = 136784623 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136784879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136784279) 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, 69797 + ... + 71729.

It is an arithmetic number, because the mean of its divisors is an integer number (10675680).

Almost surely, 2^136784879 is an apocalyptic number.

136784879 is a deficient number, since it is larger than the sum of its proper divisors (34026001).

136784879 is a wasteful number, since it uses less digits than its factorization.

136784879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870.

The product of its digits is 2032128, while the sum is 53.

The square root of 136784879 is about 11695.5067867964. The cubic root of 136784879 is about 515.2437078236.

The spelling of 136784879 in words is "one hundred thirty-six million, seven hundred eighty-four thousand, eight hundred seventy-nine".