135613623 has 16 divisors (see below), whose sum is σ = 186982400. Its totient is φ = 87337440.

The previous prime is 135613613. The next prime is 135613627. The reversal of 135613623 is 326316531.

It is a happy number.

It is not a de Polignac number, because 135613623 - 2⁶ = 135613559 is a prime.

It is a super-2 number, since 2×135613623² = 36782109486372258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135613627) 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 in 15 ways as a sum of consecutive naturals, for example, 76218 + ... + 77976.

It is an arithmetic number, because the mean of its divisors is an integer number (11686400).

Almost surely, 2^135613623 is an apocalyptic number.

135613623 is a deficient number, since it is larger than the sum of its proper divisors (51368777).

135613623 is a wasteful number, since it uses less digits than its factorization.

135613623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622.

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

The square root of 135613623 is about 11645.3262298658. The cubic root of 135613623 is about 513.7688542166.

The spelling of 135613623 in words is "one hundred thirty-five million, six hundred thirteen thousand, six hundred twenty-three".