133893446 has 4 divisors (see below), whose sum is σ = 200840172. Its totient is φ = 66946722.

The previous prime is 133893439. The next prime is 133893449. The reversal of 133893446 is 644398331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644398331 = 1321 ⋅487811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133893449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33473360 + ... + 33473363.

It is an arithmetic number, because the mean of its divisors is an integer number (50210043).

Almost surely, 2^133893446 is an apocalyptic number.

133893446 is a deficient number, since it is larger than the sum of its proper divisors (66946726).

133893446 is an equidigital number, since it uses as much as digits as its factorization.

133893446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66946725.

The product of its digits is 186624, while the sum is 41.

The square root of 133893446 is about 11571.2335556759. The cubic root of 133893446 is about 511.5873215792.

The spelling of 133893446 in words is "one hundred thirty-three million, eight hundred ninety-three thousand, four hundred forty-six".