133620399 has 12 divisors (see below), whose sum is σ = 210553512. Its totient is φ = 80982000.

The previous prime is 133620329. The next prime is 133620413. The reversal of 133620399 is 993026331.

It is a happy number.

It is not a de Polignac number, because 133620399 - 2⁸ = 133620143 is a prime.

It is a super-2 number, since 2×133620399² = 35708822057838402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133620329) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 674752 + ... + 674949.

It is an arithmetic number, because the mean of its divisors is an integer number (17546126).

Almost surely, 2^133620399 is an apocalyptic number.

133620399 is a deficient number, since it is larger than the sum of its proper divisors (76933113).

133620399 is a wasteful number, since it uses less digits than its factorization.

133620399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349718 (or 1349715 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 133620399 is about 11559.4290083896. The cubic root of 133620399 is about 511.2393273358.

The spelling of 133620399 in words is "one hundred thirty-three million, six hundred twenty thousand, three hundred ninety-nine".