90909091027 has 2 divisors, whose sum is σ = 90909091028. Its totient is φ = 90909091026.

The previous prime is 90909090977. The next prime is 90909091067. The reversal of 90909091027 is 72019090909.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90909091027 - 2³⁵ = 56549352659 is a prime.

It is not a weakly prime, because it can be changed into another prime (90909091067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45454545513 + 45454545514.

It is an arithmetic number, because the mean of its divisors is an integer number (45454545514).

Almost surely, 2^90909091027 is an apocalyptic number.

90909091027 is a deficient number, since it is larger than the sum of its proper divisors (1).

90909091027 is an equidigital number, since it uses as much as digits as its factorization.

90909091027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 46.

The spelling of 90909091027 in words is "ninety billion, nine hundred nine million, ninety-one thousand, twenty-seven".