136913723 has 4 divisors (see below), whose sum is σ = 137459448. Its totient is φ = 136368000.

The previous prime is 136913683. The next prime is 136913731. The reversal of 136913723 is 327319631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327319631 = 19 ⋅17227349.

It is a cyclic number.

It is not a de Polignac number, because 136913723 - 2⁸ = 136913467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136913743) 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, 272486 + ... + 272987.

It is an arithmetic number, because the mean of its divisors is an integer number (34364862).

Almost surely, 2^136913723 is an apocalyptic number.

136913723 is a deficient number, since it is larger than the sum of its proper divisors (545725).

136913723 is an equidigital number, since it uses as much as digits as its factorization.

136913723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545724.

The product of its digits is 20412, while the sum is 35.

The square root of 136913723 is about 11701.0137594996. The cubic root of 136913723 is about 515.4054343430.

The spelling of 136913723 in words is "one hundred thirty-six million, nine hundred thirteen thousand, seven hundred twenty-three".