136538723 has 2 divisors, whose sum is σ = 136538724. Its totient is φ = 136538722.

The previous prime is 136538719. The next prime is 136538737. The reversal of 136538723 is 327835631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136538723 - 2² = 136538719 is a prime.

It is not a weakly prime, because it can be changed into another prime (136538783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68269361 + 68269362.

It is an arithmetic number, because the mean of its divisors is an integer number (68269362).

Almost surely, 2^136538723 is an apocalyptic number.

136538723 is a deficient number, since it is larger than the sum of its proper divisors (1).

136538723 is an equidigital number, since it uses as much as digits as its factorization.

136538723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 136538723 is about 11684.9785194497. The cubic root of 136538723 is about 514.9344473072.

The spelling of 136538723 in words is "one hundred thirty-six million, five hundred thirty-eight thousand, seven hundred twenty-three".