135631723 has 2 divisors, whose sum is σ = 135631724. Its totient is φ = 135631722.

The previous prime is 135631721. The next prime is 135631733. The reversal of 135631723 is 327136531.

It is a weak prime.

It is an emirp because it is prime and its reverse (327136531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135631723 - 2¹ = 135631721 is a prime.

Together with 135631721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135631721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67815861 + 67815862.

It is an arithmetic number, because the mean of its divisors is an integer number (67815862).

Almost surely, 2^135631723 is an apocalyptic number.

135631723 is a deficient number, since it is larger than the sum of its proper divisors (1).

135631723 is an equidigital number, since it uses as much as digits as its factorization.

135631723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 31.

The square root of 135631723 is about 11646.1033397442. The cubic root of 135631723 is about 513.7917103338.

The spelling of 135631723 in words is "one hundred thirty-five million, six hundred thirty-one thousand, seven hundred twenty-three".