997731943492 has 12 divisors (see below), whose sum is σ = 1758775653180. Its totient is φ = 495224614016.

The previous prime is 997731943471. The next prime is 997731943529. The reversal of 997731943492 is 294349137799.

It can be written as a sum of positive squares in 2 ways, for example, as 445882049536 + 551849893956 = 667744^2 + 742866^2 .

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 3 ways as a sum of consecutive naturals, for example, 910338817 + ... + 910339912.

It is an arithmetic number, because the mean of its divisors is an integer number (146564637765).

Almost surely, 2^997731943492 is an apocalyptic number.

It is an amenable number.

997731943492 is a deficient number, since it is larger than the sum of its proper divisors (761043709688).

997731943492 is a wasteful number, since it uses less digits than its factorization.

997731943492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820678870 (or 1820678868 counting only the distinct ones).

The product of its digits is 92588832, while the sum is 67.

The spelling of 997731943492 in words is "nine hundred ninety-seven billion, seven hundred thirty-one million, nine hundred forty-three thousand, four hundred ninety-two".