133400889 has 12 divisors (see below), whose sum is σ = 192933936. Its totient is φ = 88821432.

The previous prime is 133400879. The next prime is 133400909. The reversal of 133400889 is 988004331.

It is not a de Polignac number, because 133400889 - 2⁸ = 133400633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133400809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1519 + ... + 16404.

It is an arithmetic number, because the mean of its divisors is an integer number (16077828).

Almost surely, 2^133400889 is an apocalyptic number.

It is an amenable number.

133400889 is a deficient number, since it is larger than the sum of its proper divisors (59533047).

133400889 is a wasteful number, since it uses less digits than its factorization.

133400889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18756 (or 18753 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 133400889 is about 11549.9302595297. The cubic root of 133400889 is about 510.9592212689.

The spelling of 133400889 in words is "one hundred thirty-three million, four hundred thousand, eight hundred eighty-nine".