136642459 has 2 divisors, whose sum is σ = 136642460. Its totient is φ = 136642458.

The previous prime is 136642399. The next prime is 136642469. The reversal of 136642459 is 954246631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136642459 is a prime.

It is not a weakly prime, because it can be changed into another prime (136642469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68321229 + 68321230.

It is an arithmetic number, because the mean of its divisors is an integer number (68321230).

Almost surely, 2^136642459 is an apocalyptic number.

136642459 is a deficient number, since it is larger than the sum of its proper divisors (1).

136642459 is an equidigital number, since it uses as much as digits as its factorization.

136642459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The square root of 136642459 is about 11689.4165380484. The cubic root of 136642459 is about 515.0648223304.

The spelling of 136642459 in words is "one hundred thirty-six million, six hundred forty-two thousand, four hundred fifty-nine".