136372609 has 2 divisors, whose sum is σ = 136372610. Its totient is φ = 136372608.

The previous prime is 136372603. The next prime is 136372619. The reversal of 136372609 is 906273631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70308225 + 66064384 = 8385^2 + 8128^2 .

It is a cyclic number.

It is not a de Polignac number, because 136372609 - 2¹⁷ = 136241537 is a prime.

It is not a weakly prime, because it can be changed into another prime (136372603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68186304 + 68186305.

It is an arithmetic number, because the mean of its divisors is an integer number (68186305).

Almost surely, 2^136372609 is an apocalyptic number.

It is an amenable number.

136372609 is a deficient number, since it is larger than the sum of its proper divisors (1).

136372609 is an equidigital number, since it uses as much as digits as its factorization.

136372609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 136372609 is about 11677.8683414397. The cubic root of 136372609 is about 514.7255382373.

The spelling of 136372609 in words is "one hundred thirty-six million, three hundred seventy-two thousand, six hundred nine".