136620389 has 2 divisors, whose sum is σ = 136620390. Its totient is φ = 136620388.

The previous prime is 136620371. The next prime is 136620413. The reversal of 136620389 is 983026631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108847489 + 27772900 = 10433^2 + 5270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136620389 is a prime.

It is a super-2 number, since 2×136620389² = 37330261381022642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136625389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68310194 + 68310195.

It is an arithmetic number, because the mean of its divisors is an integer number (68310195).

Almost surely, 2^136620389 is an apocalyptic number.

It is an amenable number.

136620389 is a deficient number, since it is larger than the sum of its proper divisors (1).

136620389 is an equidigital number, since it uses as much as digits as its factorization.

136620389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 136620389 is about 11688.4724836054. The cubic root of 136620389 is about 515.0370903629.

The spelling of 136620389 in words is "one hundred thirty-six million, six hundred twenty thousand, three hundred eighty-nine".