136969631 has 2 divisors, whose sum is σ = 136969632. Its totient is φ = 136969630.

The previous prime is 136969607. The next prime is 136969667.

136969631 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136969631 is a prime.

It is a super-2 number, since 2×136969631² = 37521359632552322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136969691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68484815 + 68484816.

It is an arithmetic number, because the mean of its divisors is an integer number (68484816).

Almost surely, 2^136969631 is an apocalyptic number.

136969631 is a deficient number, since it is larger than the sum of its proper divisors (1).

136969631 is an equidigital number, since it uses as much as digits as its factorization.

136969631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 44.

The square root of 136969631 is about 11703.4025394327. The cubic root of 136969631 is about 515.4755791639.

The spelling of 136969631 in words is "one hundred thirty-six million, nine hundred sixty-nine thousand, six hundred thirty-one".