133604613 has 16 divisors (see below), whose sum is σ = 199083840. Its totient is φ = 88551792.

The previous prime is 133604591. The next prime is 133604617. The reversal of 133604613 is 316406331.

133604613 is a `hidden beast` number, since 13 + 36 + 0 + 4 + 613 = 666.

It is not a de Polignac number, because 133604613 - 2⁸ = 133604357 is a prime.

It is a super-2 number, since 2×133604613² = 35700385229759538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133604617) 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, 9631 + ... + 18972.

It is an arithmetic number, because the mean of its divisors is an integer number (12442740).

Almost surely, 2^133604613 is an apocalyptic number.

It is an amenable number.

133604613 is a deficient number, since it is larger than the sum of its proper divisors (65479227).

133604613 is a wasteful number, since it uses less digits than its factorization.

133604613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28785 (or 28779 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 133604613 is about 11558.7461690272. The cubic root of 133604613 is about 511.2191938285.

The spelling of 133604613 in words is "one hundred thirty-three million, six hundred four thousand, six hundred thirteen".