136390913 has 2 divisors, whose sum is σ = 136390914. Its totient is φ = 136390912.

The previous prime is 136390909. The next prime is 136390931. The reversal of 136390913 is 319093631.

Together with next prime (136390931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126855169 + 9535744 = 11263^2 + 3088^2 .

It is a cyclic number.

It is not a de Polignac number, because 136390913 - 2² = 136390909 is a prime.

It is a super-2 number, since 2×136390913² = 37204962297947138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (136390963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68195456 + 68195457.

It is an arithmetic number, because the mean of its divisors is an integer number (68195457).

Almost surely, 2^136390913 is an apocalyptic number.

It is an amenable number.

136390913 is a deficient number, since it is larger than the sum of its proper divisors (1).

136390913 is an equidigital number, since it uses as much as digits as its factorization.

136390913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 136390913 is about 11678.6520198180. The cubic root of 136390913 is about 514.7485661137.

The spelling of 136390913 in words is "one hundred thirty-six million, three hundred ninety thousand, nine hundred thirteen".