136390907 has 4 divisors (see below), whose sum is σ = 136991976. Its totient is φ = 135789840.

The previous prime is 136390879. The next prime is 136390909. The reversal of 136390907 is 709093631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709093631 = 1741 ⋅407291.

It is a cyclic number.

It is not a de Polignac number, because 136390907 - 2¹⁸ = 136128763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136390909) 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, 300194 + ... + 300647.

It is an arithmetic number, because the mean of its divisors is an integer number (34247994).

Almost surely, 2^136390907 is an apocalyptic number.

136390907 is a deficient number, since it is larger than the sum of its proper divisors (601069).

136390907 is an equidigital number, since it uses as much as digits as its factorization.

136390907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601068.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 136390907 is about 11678.6517629391. The cubic root of 136390907 is about 514.7485585656.

The spelling of 136390907 in words is "one hundred thirty-six million, three hundred ninety thousand, nine hundred seven".