136868505 has 16 divisors (see below), whose sum is σ = 219369600. Its totient is φ = 72869888.

The previous prime is 136868489. The next prime is 136868507. The reversal of 136868505 is 505868631.

It is a cyclic number.

It is not a de Polignac number, because 136868505 - 2⁴ = 136868489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136868507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1369 + ... + 16601.

It is an arithmetic number, because the mean of its divisors is an integer number (13710600).

Almost surely, 2^136868505 is an apocalyptic number.

136868505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136868505 is a deficient number, since it is larger than the sum of its proper divisors (82501095).

136868505 is a wasteful number, since it uses less digits than its factorization.

136868505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15840.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 136868505 is about 11699.0813741934. The cubic root of 136868505 is about 515.3486877326.

The spelling of 136868505 in words is "one hundred thirty-six million, eight hundred sixty-eight thousand, five hundred five".