90271099 has 2 divisors, whose sum is σ = 90271100. Its totient is φ = 90271098.

The previous prime is 90271087. The next prime is 90271123. The reversal of 90271099 is 99017209.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90271099 is a prime.

It is not a weakly prime, because it can be changed into another prime (90271079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45135549 + 45135550.

It is an arithmetic number, because the mean of its divisors is an integer number (45135550).

Almost surely, 2^90271099 is an apocalyptic number.

90271099 is a deficient number, since it is larger than the sum of its proper divisors (1).

90271099 is an equidigital number, since it uses as much as digits as its factorization.

90271099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 90271099 is about 9501.1104087891. The cubic root of 90271099 is about 448.5899881865.

The spelling of 90271099 in words is "ninety million, two hundred seventy-one thousand, ninety-nine".