90214889717 has 2 divisors, whose sum is σ = 90214889718. Its totient is φ = 90214889716.

The previous prime is 90214889671. The next prime is 90214889749. The reversal of 90214889717 is 71798841209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73470270916 + 16744618801 = 271054^2 + 129401^2 .

It is a cyclic number.

It is not a de Polignac number, because 90214889717 - 2²⁰ = 90213841141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90214889797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45107444858 + 45107444859.

It is an arithmetic number, because the mean of its divisors is an integer number (45107444859).

Almost surely, 2^90214889717 is an apocalyptic number.

It is an amenable number.

90214889717 is a deficient number, since it is larger than the sum of its proper divisors (1).

90214889717 is an equidigital number, since it uses as much as digits as its factorization.

90214889717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The spelling of 90214889717 in words is "ninety billion, two hundred fourteen million, eight hundred eighty-nine thousand, seven hundred seventeen".