136171961 has 2 divisors, whose sum is σ = 136171962. Its totient is φ = 136171960.

The previous prime is 136171943. The next prime is 136171969. The reversal of 136171961 is 169171631.

136171961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136165561 + 6400 = 11669^2 + 80^2 .

It is an emirp because it is prime and its reverse (169171631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136171961 - 2⁶ = 136171897 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (136171969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68085980 + 68085981.

It is an arithmetic number, because the mean of its divisors is an integer number (68085981).

Almost surely, 2^136171961 is an apocalyptic number.

It is an amenable number.

136171961 is a deficient number, since it is larger than the sum of its proper divisors (1).

136171961 is an equidigital number, since it uses as much as digits as its factorization.

136171961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 136171961 is about 11669.2742276459. The cubic root of 136171961 is about 514.4729720169.

The spelling of 136171961 in words is "one hundred thirty-six million, one hundred seventy-one thousand, nine hundred sixty-one".