90083994722 has 18 divisors (see below), whose sum is σ = 136827141633. Its totient is φ = 44481919752.

The previous prime is 90083994713. The next prime is 90083994731. The reversal of 90083994722 is 22749938009.

It is an interprime number because it is at equal distance from previous prime (90083994713) and next prime (90083994731).

It can be written as a sum of positive squares in 2 ways, for example, as 89628983161 + 455011561 = 299381^2 + 21331^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=212231.

It is a super-2 number, since 2×90083994722² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 8 ways as a sum of consecutive naturals, for example, 35229068 + ... + 35231624.

Almost surely, 2^90083994722 is an apocalyptic number.

90083994722 is a deficient number, since it is larger than the sum of its proper divisors (46743146911).

90083994722 is an frugal number, since it uses more digits than its factorization.

90083994722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5282 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 90083994722 in words is "ninety billion, eighty-three million, nine hundred ninety-four thousand, seven hundred twenty-two".