133888031 has 2 divisors, whose sum is σ = 133888032. Its totient is φ = 133888030.

The previous prime is 133888021. The next prime is 133888061. The reversal of 133888031 is 130888331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133888031 - 2⁶ = 133887967 is a prime.

It is a super-2 number, since 2×133888031² = 35852009690113922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 133887982 and 133888000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133888021) 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 as a sum of consecutive naturals, namely, 66944015 + 66944016.

It is an arithmetic number, because the mean of its divisors is an integer number (66944016).

Almost surely, 2^133888031 is an apocalyptic number.

133888031 is a deficient number, since it is larger than the sum of its proper divisors (1).

133888031 is an equidigital number, since it uses as much as digits as its factorization.

133888031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 133888031 is about 11570.9995678852. Note that the first 3 decimals coincide. The cubic root of 133888031 is about 511.5804248445.

The spelling of 133888031 in words is "one hundred thirty-three million, eight hundred eighty-eight thousand, thirty-one".