136956431 has 2 divisors, whose sum is σ = 136956432. Its totient is φ = 136956430.

The previous prime is 136956371. The next prime is 136956451. The reversal of 136956431 is 134659631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136956431 - 2⁶ = 136956367 is a prime.

It is a super-2 number, since 2×136956431² = 37514127984515522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136956451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68478215 + 68478216.

It is an arithmetic number, because the mean of its divisors is an integer number (68478216).

Almost surely, 2^136956431 is an apocalyptic number.

136956431 is a deficient number, since it is larger than the sum of its proper divisors (1).

136956431 is an equidigital number, since it uses as much as digits as its factorization.

136956431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The square root of 136956431 is about 11702.8385872830. The cubic root of 136956431 is about 515.4590195412.

The spelling of 136956431 in words is "one hundred thirty-six million, nine hundred fifty-six thousand, four hundred thirty-one".