90697052071 has 2 divisors, whose sum is σ = 90697052072. Its totient is φ = 90697052070.

The previous prime is 90697052063. The next prime is 90697052167. The reversal of 90697052071 is 17025079609.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90697052071 - 2³ = 90697052063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90697052021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45348526035 + 45348526036.

It is an arithmetic number, because the mean of its divisors is an integer number (45348526036).

Almost surely, 2^90697052071 is an apocalyptic number.

90697052071 is a deficient number, since it is larger than the sum of its proper divisors (1).

90697052071 is an equidigital number, since it uses as much as digits as its factorization.

90697052071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 46.

The spelling of 90697052071 in words is "ninety billion, six hundred ninety-seven million, fifty-two thousand, seventy-one".