136904879 has 4 divisors (see below), whose sum is σ = 136930920. Its totient is φ = 136878840.

The previous prime is 136904851. The next prime is 136904891. The reversal of 136904879 is 978409631.

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 136904879 - 2⁸ = 136904623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136901879) 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, 2057 + ... + 16674.

It is an arithmetic number, because the mean of its divisors is an integer number (34232730).

Almost surely, 2^136904879 is an apocalyptic number.

136904879 is a deficient number, since it is larger than the sum of its proper divisors (26041).

136904879 is an equidigital number, since it uses as much as digits as its factorization.

136904879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26040.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 136904879 is about 11700.6358374235. The cubic root of 136904879 is about 515.3943364932.

The spelling of 136904879 in words is "one hundred thirty-six million, nine hundred four thousand, eight hundred seventy-nine".