133691967 has 6 divisors (see below), whose sum is σ = 193110632. Its totient is φ = 89127972.

The previous prime is 133691963. The next prime is 133691969. The reversal of 133691967 is 769196331.

It is not a de Polignac number, because 133691967 - 2² = 133691963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133691963) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7427323 + ... + 7427340.

Almost surely, 2^133691967 is an apocalyptic number.

133691967 is a deficient number, since it is larger than the sum of its proper divisors (59418665).

133691967 is a wasteful number, since it uses less digits than its factorization.

133691967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14854669 (or 14854666 counting only the distinct ones).

The product of its digits is 183708, while the sum is 45.

The square root of 133691967 is about 11562.5242486232. The cubic root of 133691967 is about 511.3305854722.

The spelling of 133691967 in words is "one hundred thirty-three million, six hundred ninety-one thousand, nine hundred sixty-seven".