136726431 has 32 divisors (see below), whose sum is σ = 194116608. Its totient is φ = 85493760.

The previous prime is 136726417. The next prime is 136726459. The reversal of 136726431 is 134627631.

136726431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136726431 - 2⁶ = 136726367 is a prime.

It is a super-2 number, since 2×136726431² = 37388233867995522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136726392 and 136726401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136726531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387151 + ... + 387503.

It is an arithmetic number, because the mean of its divisors is an integer number (6066144).

Almost surely, 2^136726431 is an apocalyptic number.

136726431 is a deficient number, since it is larger than the sum of its proper divisors (57390177).

136726431 is a wasteful number, since it uses less digits than its factorization.

136726431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its digits is 18144, while the sum is 33.

The square root of 136726431 is about 11693.0077824313. The cubic root of 136726431 is about 515.1703097140.

The spelling of 136726431 in words is "one hundred thirty-six million, seven hundred twenty-six thousand, four hundred thirty-one".