997197456 has 20 divisors (see below), whose sum is σ = 2576093552. Its totient is φ = 332399136.

The previous prime is 997197413. The next prime is 997197479. The reversal of 997197456 is 654791799.

It is a junction number, because it is equal to n+sod(n) for n = 997197396 and 997197405.

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, 10387426 + ... + 10387521.

Almost surely, 2^997197456 is an apocalyptic number.

It is an amenable number.

997197456 is an abundant number, since it is smaller than the sum of its proper divisors (1578896096).

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

997197456 is a wasteful number, since it uses less digits than its factorization.

997197456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20774958 (or 20774952 counting only the distinct ones).

The product of its digits is 4286520, while the sum is 57.

The square root of 997197456 is about 31578.4334000279. The cubic root of 997197456 is about 999.0649446106.

The spelling of 997197456 in words is "nine hundred ninety-seven million, one hundred ninety-seven thousand, four hundred fifty-six".