133907836 has 6 divisors (see below), whose sum is σ = 234338720. Its totient is φ = 66953916.

The previous prime is 133907831. The next prime is 133907849. The reversal of 133907836 is 638709331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133907831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16738476 + ... + 16738483.

Almost surely, 2^133907836 is an apocalyptic number.

It is an amenable number.

133907836 is a deficient number, since it is larger than the sum of its proper divisors (100430884).

133907836 is a wasteful number, since it uses less digits than its factorization.

133907836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33476963 (or 33476961 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 133907836 is about 11571.8553395728. The cubic root of 133907836 is about 511.6056482861.

The spelling of 133907836 in words is "one hundred thirty-three million, nine hundred seven thousand, eight hundred thirty-six".