135623613 has 16 divisors (see below), whose sum is σ = 185976000. Its totient is φ = 87861120.

The previous prime is 135623599. The next prime is 135623627. The reversal of 135623613 is 316326531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (135623599) and next prime (135623627).

It is not a de Polignac number, because 135623613 - 2⁴ = 135623597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135623513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31038 + ... + 35136.

It is an arithmetic number, because the mean of its divisors is an integer number (11623500).

Almost surely, 2^135623613 is an apocalyptic number.

It is an amenable number.

135623613 is a deficient number, since it is larger than the sum of its proper divisors (50352387).

135623613 is a wasteful number, since it uses less digits than its factorization.

135623613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4412.

The product of its digits is 9720, while the sum is 30.

The square root of 135623613 is about 11645.7551494096. The cubic root of 135623613 is about 513.7814695294.

The spelling of 135623613 in words is "one hundred thirty-five million, six hundred twenty-three thousand, six hundred thirteen".