133753831 has 2 divisors, whose sum is σ = 133753832. Its totient is φ = 133753830.

The previous prime is 133753819. The next prime is 133753859. The reversal of 133753831 is 138357331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133753831 - 2²⁵ = 100199399 is a prime.

It is a super-2 number, since 2×133753831² = 35780174614353122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133753811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66876915 + 66876916.

It is an arithmetic number, because the mean of its divisors is an integer number (66876916).

Almost surely, 2^133753831 is an apocalyptic number.

133753831 is a deficient number, since it is larger than the sum of its proper divisors (1).

133753831 is an equidigital number, since it uses as much as digits as its factorization.

133753831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 133753831 is about 11565.1991336077. The cubic root of 133753831 is about 511.4094435569.

The spelling of 133753831 in words is "one hundred thirty-three million, seven hundred fifty-three thousand, eight hundred thirty-one".