133893999 has 8 divisors (see below), whose sum is σ = 198361520. Its totient is φ = 89262648.

The previous prime is 133893997. The next prime is 133894027. The reversal of 133893999 is 999398331.

It is not a de Polignac number, because 133893999 - 2¹ = 133893997 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 (133893997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2479492 + ... + 2479545.

It is an arithmetic number, because the mean of its divisors is an integer number (24795190).

Almost surely, 2^133893999 is an apocalyptic number.

133893999 is a deficient number, since it is larger than the sum of its proper divisors (64467521).

133893999 is an equidigital number, since it uses as much as digits as its factorization.

133893999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4959046 (or 4959040 counting only the distinct ones).

The product of its digits is 1417176, while the sum is 54.

The square root of 133893999 is about 11571.2574511157. The cubic root of 133893999 is about 511.5880258890.

The spelling of 133893999 in words is "one hundred thirty-three million, eight hundred ninety-three thousand, nine hundred ninety-nine".