136513905 has 64 divisors (see below), whose sum is σ = 249523200. Its totient is φ = 63141120.

The previous prime is 136513903. The next prime is 136513931. The reversal of 136513905 is 509315631.

It is not a de Polignac number, because 136513905 - 2¹ = 136513903 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (136513903) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 360006 + ... + 360384.

It is an arithmetic number, because the mean of its divisors is an integer number (3898800).

Almost surely, 2^136513905 is an apocalyptic number.

136513905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136513905 is a deficient number, since it is larger than the sum of its proper divisors (113009295).

136513905 is a wasteful number, since it uses less digits than its factorization.

136513905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494.

The product of its (nonzero) digits is 12150, while the sum is 33.

The square root of 136513905 is about 11683.9165094586. The cubic root of 136513905 is about 514.9032463477.

The spelling of 136513905 in words is "one hundred thirty-six million, five hundred thirteen thousand, nine hundred five".