135712631 has 4 divisors (see below), whose sum is σ = 136310712. Its totient is φ = 135114552.

The previous prime is 135712613. The next prime is 135712651. The reversal of 135712631 is 136217531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136217531 = 8623 ⋅15797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135712631 is a prime.

It is a super-2 number, since 2×135712631² = 36835836425884322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135712594 and 135712603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135712651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298700 + ... + 299153.

It is an arithmetic number, because the mean of its divisors is an integer number (34077678).

Almost surely, 2^135712631 is an apocalyptic number.

135712631 is a deficient number, since it is larger than the sum of its proper divisors (598081).

135712631 is an equidigital number, since it uses as much as digits as its factorization.

135712631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598080.

The product of its digits is 3780, while the sum is 29.

The square root of 135712631 is about 11649.5764300682. The cubic root of 135712631 is about 513.8938535877.

The spelling of 135712631 in words is "one hundred thirty-five million, seven hundred twelve thousand, six hundred thirty-one".