133115923 has 4 divisors (see below), whose sum is σ = 134337280. Its totient is φ = 131894568.

The previous prime is 133115903. The next prime is 133115959. The reversal of 133115923 is 329511331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133115923 - 2¹³ = 133107731 is a prime.

It is a super-2 number, since 2×133115923² = 35439697912283858, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133115891 and 133115900.

It is not an unprimeable number, because it can be changed into a prime (133115903) 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, 610515 + ... + 610732.

It is an arithmetic number, because the mean of its divisors is an integer number (33584320).

Almost surely, 2^133115923 is an apocalyptic number.

133115923 is a deficient number, since it is larger than the sum of its proper divisors (1221357).

133115923 is a wasteful number, since it uses less digits than its factorization.

133115923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221356.

The product of its digits is 2430, while the sum is 28.

The square root of 133115923 is about 11537.5873994523. The cubic root of 133115923 is about 510.5951312214.

The spelling of 133115923 in words is "one hundred thirty-three million, one hundred fifteen thousand, nine hundred twenty-three".