133897164 has 24 divisors (see below), whose sum is σ = 312997440. Its totient is φ = 44550864.

The previous prime is 133897097. The next prime is 133897187. The reversal of 133897164 is 461798331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3154 + ... + 16665.

It is an arithmetic number, because the mean of its divisors is an integer number (13041560).

Almost surely, 2^133897164 is an apocalyptic number.

It is an amenable number.

133897164 is an abundant number, since it is smaller than the sum of its proper divisors (179100276).

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

133897164 is a wasteful number, since it uses less digits than its factorization.

133897164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20389 (or 20387 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 133897164 is about 11571.3942115892. The cubic root of 133897164 is about 511.5920568472.

The spelling of 133897164 in words is "one hundred thirty-three million, eight hundred ninety-seven thousand, one hundred sixty-four".