136445431 has 2 divisors, whose sum is σ = 136445432. Its totient is φ = 136445430.

The previous prime is 136445429. The next prime is 136445447. The reversal of 136445431 is 134544631.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136445431 - 2¹ = 136445429 is a prime.

It is a super-2 number, since 2×136445431² = 37234711281551522, which contains 22 as substring.

Together with 136445429, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 136445393 and 136445402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136445401) 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, 68222715 + 68222716.

It is an arithmetic number, because the mean of its divisors is an integer number (68222716).

Almost surely, 2^136445431 is an apocalyptic number.

136445431 is a deficient number, since it is larger than the sum of its proper divisors (1).

136445431 is an equidigital number, since it uses as much as digits as its factorization.

136445431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 136445431 is about 11680.9858744885. The cubic root of 136445431 is about 514.8171418554.

The spelling of 136445431 in words is "one hundred thirty-six million, four hundred forty-five thousand, four hundred thirty-one".