997422724 has 9 divisors (see below), whose sum is σ = 1745600311. Its totient is φ = 498679780.

The previous prime is 997422683. The next prime is 997422731. The reversal of 997422724 is 427224799.

The square root of 997422724 is 31582.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 55269 + ... + 71059.

Almost surely, 2^997422724 is an apocalyptic number.

997422724 is the 31582-nd square number.

It is an amenable number.

997422724 is a deficient number, since it is larger than the sum of its proper divisors (748177587).

997422724 is an frugal number, since it uses more digits than its factorization.

997422724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31586 (or 15793 counting only the distinct ones).

The product of its digits is 508032, while the sum is 46.

The cubic root of 997422724 is about 999.1401689024.

The spelling of 997422724 in words is "nine hundred ninety-seven million, four hundred twenty-two thousand, seven hundred twenty-four".