9290991998281 has 4 divisors (see below), whose sum is σ = 10618276569472. Its totient is φ = 7963707427092.

The previous prime is 9290991998273. The next prime is 9290991998303. The reversal of 9290991998281 is 1828991990929.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9290991998281 - 2³ = 9290991998273 is a prime.

It is a super-2 number, since 2×9290991998281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9290991998198 and 9290991998207.

It is not an unprimeable number, because it can be changed into a prime (9290991998201) 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, 663642285585 + ... + 663642285598.

It is an arithmetic number, because the mean of its divisors is an integer number (2654569142368).

Almost surely, 2^{9290991998281} is an apocalyptic number.

It is an amenable number.

9290991998281 is a deficient number, since it is larger than the sum of its proper divisors (1327284571191).

9290991998281 is a wasteful number, since it uses less digits than its factorization.

9290991998281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327284571190.

The product of its (nonzero) digits is 136048896, while the sum is 76.

The spelling of 9290991998281 in words is "nine trillion, two hundred ninety billion, nine hundred ninety-one million, nine hundred ninety-eight thousand, two hundred eighty-one".