133011988 has 6 divisors (see below), whose sum is σ = 232770986. Its totient is φ = 66505992.

The previous prime is 133011947. The next prime is 133012001. The reversal of 133011988 is 889110331.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 132987024 + 24964 = 11532^2 + 158^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16626495 + ... + 16626502.

Almost surely, 2^133011988 is an apocalyptic number.

It is an amenable number.

133011988 is a deficient number, since it is larger than the sum of its proper divisors (99758998).

133011988 is a wasteful number, since it uses less digits than its factorization.

133011988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33253001 (or 33252999 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 133011988 is about 11533.0823286752. The cubic root of 133011988 is about 510.4622081732.

The spelling of 133011988 in words is "one hundred thirty-three million, eleven thousand, nine hundred eighty-eight".