133902091 has 2 divisors, whose sum is σ = 133902092. Its totient is φ = 133902090.

The previous prime is 133902073. The next prime is 133902143. The reversal of 133902091 is 190209331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133902091 - 2⁵ = 133902059 is a prime.

It is not a weakly prime, because it can be changed into another prime (133902061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66951045 + 66951046.

It is an arithmetic number, because the mean of its divisors is an integer number (66951046).

Almost surely, 2^133902091 is an apocalyptic number.

133902091 is a deficient number, since it is larger than the sum of its proper divisors (1).

133902091 is an equidigital number, since it uses as much as digits as its factorization.

133902091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 133902091 is about 11571.6071053247. The cubic root of 133902091 is about 511.5983317701.

The spelling of 133902091 in words is "one hundred thirty-three million, nine hundred two thousand, ninety-one".