997280911 has 54 divisors (see below), whose sum is σ = 1244528880. Its totient is φ = 798145920.

The previous prime is 997280909. The next prime is 997280923. The reversal of 997280911 is 119082799.

It is a happy number.

It is not a de Polignac number, because 997280911 - 2¹ = 997280909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997280111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 12623770 + ... + 12623848.

Almost surely, 2^997280911 is an apocalyptic number.

997280911 is a deficient number, since it is larger than the sum of its proper divisors (247247969).

997280911 is a wasteful number, since it uses less digits than its factorization.

997280911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 997280911 is about 31579.7547647223. The cubic root of 997280911 is about 999.0928142629.

The spelling of 997280911 in words is "nine hundred ninety-seven million, two hundred eighty thousand, nine hundred eleven".