133800731 has 16 divisors (see below), whose sum is σ = 139708800. Its totient is φ = 128069568.

The previous prime is 133800721. The next prime is 133800773. The reversal of 133800731 is 137008331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133800731 is a prime.

It is a super-2 number, since 2×133800731² = 35805271232268722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133800731.

It is not an unprimeable number, because it can be changed into a prime (133800721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435680 + ... + 435986.

It is an arithmetic number, because the mean of its divisors is an integer number (8731800).

Almost surely, 2^133800731 is an apocalyptic number.

133800731 is a deficient number, since it is larger than the sum of its proper divisors (5908069).

133800731 is an equidigital number, since it uses as much as digits as its factorization.

133800731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 133800731 is about 11567.2265906742. The cubic root of 133800731 is about 511.4692108170.

The spelling of 133800731 in words is "one hundred thirty-three million, eight hundred thousand, seven hundred thirty-one".