136231923 has 4 divisors (see below), whose sum is σ = 181642568. Its totient is φ = 90821280.

The previous prime is 136231877. The next prime is 136231981. The reversal of 136231923 is 329132631.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 136231923 - 2⁶ = 136231859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136231993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22705318 + ... + 22705323.

It is an arithmetic number, because the mean of its divisors is an integer number (45410642).

Almost surely, 2^136231923 is an apocalyptic number.

136231923 is a deficient number, since it is larger than the sum of its proper divisors (45410645).

136231923 is an equidigital number, since it uses as much as digits as its factorization.

136231923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45410644.

The product of its digits is 5832, while the sum is 30.

The square root of 136231923 is about 11671.8431706393. The cubic root of 136231923 is about 514.5484753271.

The spelling of 136231923 in words is "one hundred thirty-six million, two hundred thirty-one thousand, nine hundred twenty-three".