90195871 has 2 divisors, whose sum is σ = 90195872. Its totient is φ = 90195870.

The previous prime is 90195841. The next prime is 90195883. The reversal of 90195871 is 17859109.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90195871 - 2⁵ = 90195839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90195821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45097935 + 45097936.

It is an arithmetic number, because the mean of its divisors is an integer number (45097936).

Almost surely, 2^90195871 is an apocalyptic number.

90195871 is a deficient number, since it is larger than the sum of its proper divisors (1).

90195871 is an equidigital number, since it uses as much as digits as its factorization.

90195871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 90195871 is about 9497.1506779665. The cubic root of 90195871 is about 448.4653417728.

The spelling of 90195871 in words is "ninety million, one hundred ninety-five thousand, eight hundred seventy-one".