90007000091 has 2 divisors, whose sum is σ = 90007000092. Its totient is φ = 90007000090.

The previous prime is 90007000081. The next prime is 90007000093. The reversal of 90007000091 is 19000070009.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90007000091 is a prime.

It is a Sophie Germain prime.

Together with 90007000093, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90007000091.

It is not a weakly prime, because it can be changed into another prime (90007000093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45003500045 + 45003500046.

It is an arithmetic number, because the mean of its divisors is an integer number (45003500046).

Almost surely, 2^90007000091 is an apocalyptic number.

90007000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

90007000091 is an equidigital number, since it uses as much as digits as its factorization.

90007000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 26.

The spelling of 90007000091 in words is "ninety billion, seven million, ninety-one", and thus it is an aban number and an uban number.