133999371 has 24 divisors (see below), whose sum is σ = 214621680. Its totient is φ = 79876800.

The previous prime is 133999339. The next prime is 133999409. The reversal of 133999371 is 173999331.

It is not a de Polignac number, because 133999371 - 2⁵ = 133999339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133999471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5056 + ... + 17133.

It is an arithmetic number, because the mean of its divisors is an integer number (8942570).

Almost surely, 2^133999371 is an apocalyptic number.

133999371 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

133999371 is a deficient number, since it is larger than the sum of its proper divisors (80622309).

133999371 is a wasteful number, since it uses less digits than its factorization.

133999371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22267 (or 22264 counting only the distinct ones).

The product of its digits is 137781, while the sum is 45.

The square root of 133999371 is about 11575.8097340964. The cubic root of 133999371 is about 511.7221940089.

The spelling of 133999371 in words is "one hundred thirty-three million, nine hundred ninety-nine thousand, three hundred seventy-one".