136209907 has 2 divisors, whose sum is σ = 136209908. Its totient is φ = 136209906.

The previous prime is 136209869. The next prime is 136209949. The reversal of 136209907 is 709902631.

It is a weak prime.

It is an emirp because it is prime and its reverse (709902631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136209907 is a prime.

It is not a weakly prime, because it can be changed into another prime (136209407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68104953 + 68104954.

It is an arithmetic number, because the mean of its divisors is an integer number (68104954).

Almost surely, 2^136209907 is an apocalyptic number.

136209907 is a deficient number, since it is larger than the sum of its proper divisors (1).

136209907 is an equidigital number, since it uses as much as digits as its factorization.

136209907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 136209907 is about 11670.9000081399. The cubic root of 136209907 is about 514.5207556628.

The spelling of 136209907 in words is "one hundred thirty-six million, two hundred nine thousand, nine hundred seven".