133621885 has 4 divisors (see below), whose sum is σ = 160346268. Its totient is φ = 106897504.

The previous prime is 133621871. The next prime is 133621897. The reversal of 133621885 is 588126331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86918329 + 46703556 = 9323^2 + 6834^2 .

It is a cyclic number.

It is not a de Polignac number, because 133621885 - 2⁷ = 133621757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13362184 + ... + 13362193.

It is an arithmetic number, because the mean of its divisors is an integer number (40086567).

Almost surely, 2^133621885 is an apocalyptic number.

It is an amenable number.

133621885 is a deficient number, since it is larger than the sum of its proper divisors (26724383).

133621885 is an equidigital number, since it uses as much as digits as its factorization.

133621885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26724382.

The product of its digits is 34560, while the sum is 37.

The square root of 133621885 is about 11559.4932847422. The cubic root of 133621885 is about 511.2412225026.

The spelling of 133621885 in words is "one hundred thirty-three million, six hundred twenty-one thousand, eight hundred eighty-five".