133793904 has 20 divisors (see below), whose sum is σ = 345634376. Its totient is φ = 44597952.

The previous prime is 133793899. The next prime is 133793909. The reversal of 133793904 is 409397331.

It is an interprime number because it is at equal distance from previous prime (133793899) and next prime (133793909).

It is a super-2 number, since 2×133793904² = 35801617495122432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133793909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1393639 + ... + 1393734.

Almost surely, 2^133793904 is an apocalyptic number.

It is an amenable number.

133793904 is an abundant number, since it is smaller than the sum of its proper divisors (211840472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133793904 is a wasteful number, since it uses less digits than its factorization.

133793904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787384 (or 2787378 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 39.

The square root of 133793904 is about 11566.9314859214. The cubic root of 133793904 is about 511.4605116625.

The spelling of 133793904 in words is "one hundred thirty-three million, seven hundred ninety-three thousand, nine hundred four".