133899213 has 48 divisors (see below), whose sum is σ = 220631040. Its totient is φ = 71820000.

The previous prime is 133899211. The next prime is 133899217. The reversal of 133899213 is 312998331.

It is not a de Polignac number, because 133899213 - 2¹ = 133899211 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133899211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 533338 + ... + 533588.

It is an arithmetic number, because the mean of its divisors is an integer number (4596480).

Almost surely, 2^133899213 is an apocalyptic number.

It is an amenable number.

133899213 is a deficient number, since it is larger than the sum of its proper divisors (86731827).

133899213 is a wasteful number, since it uses less digits than its factorization.

133899213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478 (or 471 counting only the distinct ones).

The product of its digits is 34992, while the sum is 39.

The square root of 133899213 is about 11571.4827485504. The cubic root of 133899213 is about 511.5946664289.

The spelling of 133899213 in words is "one hundred thirty-three million, eight hundred ninety-nine thousand, two hundred thirteen".