136055921 has 2 divisors, whose sum is σ = 136055922. Its totient is φ = 136055920.

The previous prime is 136055897. The next prime is 136055977. The reversal of 136055921 is 129550631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133287025 + 2768896 = 11545^2 + 1664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136055921 is a prime.

It is a super-2 number, since 2×136055921² = 37022427278316482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136055021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68027960 + 68027961.

It is an arithmetic number, because the mean of its divisors is an integer number (68027961).

Almost surely, 2^136055921 is an apocalyptic number.

It is an amenable number.

136055921 is a deficient number, since it is larger than the sum of its proper divisors (1).

136055921 is an equidigital number, since it uses as much as digits as its factorization.

136055921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 136055921 is about 11664.3011363733. The cubic root of 136055921 is about 514.3267930995.

The spelling of 136055921 in words is "one hundred thirty-six million, fifty-five thousand, nine hundred twenty-one".