9897992 has 24 divisors (see below), whose sum is σ = 20098890. Its totient is φ = 4567680.

The previous prime is 9897983. The next prime is 9898001. The reversal of 9897992 is 2997989.

9897992 is nontrivially palindromic in base 11.

It is an interprime number because it is at equal distance from previous prime (9897983) and next prime (9898001).

It can be written as a sum of positive squares in 3 ways, for example, as 1522756 + 8375236 = 1234^2 + 2894^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2309 + ... + 5012.

Almost surely, 2^9897992 is an apocalyptic number.

It is an amenable number.

9897992 is an abundant number, since it is smaller than the sum of its proper divisors (10200898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9897992 is a wasteful number, since it uses less digits than its factorization.

9897992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7353 (or 7336 counting only the distinct ones).

The product of its digits is 734832, while the sum is 53.

The square root of 9897992 is about 3146.1074361821. The cubic root of 9897992 is about 214.7083986268.

The spelling of 9897992 in words is "nine million, eight hundred ninety-seven thousand, nine hundred ninety-two".