133879689 has 32 divisors (see below), whose sum is σ = 208617600. Its totient is φ = 84732480.

The previous prime is 133879687. The next prime is 133879693. The reversal of 133879689 is 986978331.

It is not a de Polignac number, because 133879689 - 2¹ = 133879687 is a prime.

It is a super-2 number, since 2×133879689² = 35847542253473442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (133879687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46362 + ... + 49164.

It is an arithmetic number, because the mean of its divisors is an integer number (6519300).

Almost surely, 2^133879689 is an apocalyptic number.

It is an amenable number.

133879689 is a deficient number, since it is larger than the sum of its proper divisors (74737911).

133879689 is a wasteful number, since it uses less digits than its factorization.

133879689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902 (or 2896 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 133879689 is about 11570.6390921159. The cubic root of 133879689 is about 511.5697998158.

The spelling of 133879689 in words is "one hundred thirty-three million, eight hundred seventy-nine thousand, six hundred eighty-nine".