136317121 has 2 divisors, whose sum is σ = 136317122. Its totient is φ = 136317120.

The previous prime is 136317119. The next prime is 136317131. The reversal of 136317121 is 121713631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89586225 + 46730896 = 9465^2 + 6836^2 .

It is a cyclic number.

It is not a de Polignac number, because 136317121 - 2¹ = 136317119 is a prime.

Together with 136317119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136317131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68158560 + 68158561.

It is an arithmetic number, because the mean of its divisors is an integer number (68158561).

Almost surely, 2^136317121 is an apocalyptic number.

It is an amenable number.

136317121 is a deficient number, since it is larger than the sum of its proper divisors (1).

136317121 is an equidigital number, since it uses as much as digits as its factorization.

136317121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 136317121 is about 11675.4923236667. The cubic root of 136317121 is about 514.6557173609.

The spelling of 136317121 in words is "one hundred thirty-six million, three hundred seventeen thousand, one hundred twenty-one".