136632905 has 4 divisors (see below), whose sum is σ = 163959492. Its totient is φ = 109306320.

The previous prime is 136632871. The next prime is 136632907. The reversal of 136632905 is 509236631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509236631 = 617 ⋅825343.

It can be written as a sum of positive squares in 2 ways, for example, as 80802121 + 55830784 = 8989^2 + 7472^2 .

It is not a de Polignac number, because 136632905 - 2⁸ = 136632649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136632907) 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 3 ways as a sum of consecutive naturals, for example, 13663286 + ... + 13663295.

It is an arithmetic number, because the mean of its divisors is an integer number (40989873).

Almost surely, 2^136632905 is an apocalyptic number.

It is an amenable number.

136632905 is a deficient number, since it is larger than the sum of its proper divisors (27326587).

136632905 is an equidigital number, since it uses as much as digits as its factorization.

136632905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27326586.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 136632905 is about 11689.0078706450. The cubic root of 136632905 is about 515.0528176577.

The spelling of 136632905 in words is "one hundred thirty-six million, six hundred thirty-two thousand, nine hundred five".