991797848 has 16 divisors (see below), whose sum is σ = 1861083000. Its totient is φ = 495509056.

The previous prime is 991797817. The next prime is 991797871. The reversal of 991797848 is 848797199.

991797848 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×991797848² = 1967325942594862208, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37778 + ... + 58401.

Almost surely, 2^991797848 is an apocalyptic number.

It is an amenable number.

991797848 is a deficient number, since it is larger than the sum of its proper divisors (869285152).

991797848 is a wasteful number, since it uses less digits than its factorization.

991797848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97474 (or 97470 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 62.

The square root of 991797848 is about 31492.8221663286. The cubic root of 991797848 is about 997.2584400510.

The spelling of 991797848 in words is "nine hundred ninety-one million, seven hundred ninety-seven thousand, eight hundred forty-eight".