136884931 has 2 divisors, whose sum is σ = 136884932. Its totient is φ = 136884930.

The previous prime is 136884929. The next prime is 136884961. The reversal of 136884931 is 139488631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136884931 - 2¹ = 136884929 is a prime.

It is a super-2 number, since 2×136884931² = 37474968669749522, which contains 22 as substring.

Together with 136884929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136884961) 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, 68442465 + 68442466.

It is an arithmetic number, because the mean of its divisors is an integer number (68442466).

Almost surely, 2^136884931 is an apocalyptic number.

136884931 is a deficient number, since it is larger than the sum of its proper divisors (1).

136884931 is an equidigital number, since it uses as much as digits as its factorization.

136884931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 43.

The square root of 136884931 is about 11699.7833740630. The cubic root of 136884931 is about 515.3693030888.

The spelling of 136884931 in words is "one hundred thirty-six million, eight hundred eighty-four thousand, nine hundred thirty-one".