133969331 has 4 divisors (see below), whose sum is σ = 133992600. Its totient is φ = 133946064.

The previous prime is 133969301. The next prime is 133969337.

It is a happy number.

133969331 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 133969331 - 2²⁶ = 66860467 is a prime.

It is a super-2 number, since 2×133969331² = 35895563297175122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133969337) 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, 4055 + ... + 16863.

It is an arithmetic number, because the mean of its divisors is an integer number (33498150).

Almost surely, 2^133969331 is an apocalyptic number.

133969331 is a deficient number, since it is larger than the sum of its proper divisors (23269).

133969331 is a wasteful number, since it uses less digits than its factorization.

133969331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23268.

The product of its digits is 39366, while the sum is 38.

The square root of 133969331 is about 11574.5121279473. The cubic root of 133969331 is about 511.6839518305.

The spelling of 133969331 in words is "one hundred thirty-three million, nine hundred sixty-nine thousand, three hundred thirty-one".