133123923 has 24 divisors (see below), whose sum is σ = 204551568. Its totient is φ = 83139072.

The previous prime is 133123877. The next prime is 133123933. The reversal of 133123923 is 329321331.

It is not a de Polignac number, because 133123923 - 2⁸ = 133123667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133123933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32815 + ... + 36647.

It is an arithmetic number, because the mean of its divisors is an integer number (8522982).

Almost surely, 2^133123923 is an apocalyptic number.

133123923 is a deficient number, since it is larger than the sum of its proper divisors (71427645).

133123923 is a wasteful number, since it uses less digits than its factorization.

133123923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083 (or 4080 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

The square root of 133123923 is about 11537.9340871752. The cubic root of 133123923 is about 510.6053595976.

The spelling of 133123923 in words is "one hundred thirty-three million, one hundred twenty-three thousand, nine hundred twenty-three".