133555790 has 16 divisors (see below), whose sum is σ = 243989712. Its totient is φ = 52624704.

The previous prime is 133555783. The next prime is 133555801. The reversal of 133555790 is 97555331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98999 + ... + 100338.

It is an arithmetic number, because the mean of its divisors is an integer number (15249357).

Almost surely, 2^133555790 is an apocalyptic number.

133555790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133555790 is a deficient number, since it is larger than the sum of its proper divisors (110433922).

133555790 is a wasteful number, since it uses less digits than its factorization.

133555790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199411.

The product of its (nonzero) digits is 70875, while the sum is 38.

The square root of 133555790 is about 11556.6340255284. The cubic root of 133555790 is about 511.1569148022.

The spelling of 133555790 in words is "one hundred thirty-three million, five hundred fifty-five thousand, seven hundred ninety".