90090098281 has 4 divisors (see below), whose sum is σ = 90125333572. Its totient is φ = 90054862992.

The previous prime is 90090098257. The next prime is 90090098303. The reversal of 90090098281 is 18289009009.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53555216400 + 36534881881 = 231420^2 + 191141^2 .

It is a cyclic number.

It is not a de Polignac number, because 90090098281 - 2¹³ = 90090090089 is a prime.

It is a super-2 number, since 2×90090098281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90090098201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17613810 + ... + 17618923.

It is an arithmetic number, because the mean of its divisors is an integer number (22531333393).

Almost surely, 2^90090098281 is an apocalyptic number.

It is an amenable number.

90090098281 is a deficient number, since it is larger than the sum of its proper divisors (35235291).

90090098281 is a wasteful number, since it uses less digits than its factorization.

90090098281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35235290.

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 90090098281 in words is "ninety billion, ninety million, ninety-eight thousand, two hundred eighty-one".