997712816 has 10 divisors (see below), whose sum is σ = 1933068612. Its totient is φ = 498856400.

The previous prime is 997712809. The next prime is 997712831. The reversal of 997712816 is 618217799.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31178510 + ... + 31178541.

Almost surely, 2^997712816 is an apocalyptic number.

It is an amenable number.

997712816 is a deficient number, since it is larger than the sum of its proper divisors (935355796).

997712816 is a wasteful number, since it uses less digits than its factorization.

997712816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62357059 (or 62357053 counting only the distinct ones).

The product of its digits is 381024, while the sum is 50.

The square root of 997712816 is about 31586.5923454873. The cubic root of 997712816 is about 999.2370233480.

The spelling of 997712816 in words is "nine hundred ninety-seven million, seven hundred twelve thousand, eight hundred sixteen".