133172899 has 2 divisors, whose sum is σ = 133172900. Its totient is φ = 133172898.

The previous prime is 133172887. The next prime is 133172909. The reversal of 133172899 is 998271331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133172899 - 2²³ = 124784291 is a prime.

It is not a weakly prime, because it can be changed into another prime (133172399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66586449 + 66586450.

It is an arithmetic number, because the mean of its divisors is an integer number (66586450).

Almost surely, 2^133172899 is an apocalyptic number.

133172899 is a deficient number, since it is larger than the sum of its proper divisors (1).

133172899 is an equidigital number, since it uses as much as digits as its factorization.

133172899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 133172899 is about 11540.0562823584. The cubic root of 133172899 is about 510.6679687851.

The spelling of 133172899 in words is "one hundred thirty-three million, one hundred seventy-two thousand, eight hundred ninety-nine".