136735909 has 2 divisors, whose sum is σ = 136735910. Its totient is φ = 136735908.

The previous prime is 136735903. The next prime is 136735961. The reversal of 136735909 is 909537631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102454884 + 34281025 = 10122^2 + 5855^2 .

It is an emirp because it is prime and its reverse (909537631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136735909 - 2³ = 136735901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136735901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68367954 + 68367955.

It is an arithmetic number, because the mean of its divisors is an integer number (68367955).

Almost surely, 2^136735909 is an apocalyptic number.

It is an amenable number.

136735909 is a deficient number, since it is larger than the sum of its proper divisors (1).

136735909 is an equidigital number, since it uses as much as digits as its factorization.

136735909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 43.

The square root of 136735909 is about 11693.4130603515. The cubic root of 136735909 is about 515.1822134631.

The spelling of 136735909 in words is "one hundred thirty-six million, seven hundred thirty-five thousand, nine hundred nine".