997323812 has 6 divisors (see below), whose sum is σ = 1745316678. Its totient is φ = 498661904.

The previous prime is 997323797. The next prime is 997323823. The reversal of 997323812 is 218323799.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 898440676 + 98883136 = 29974^2 + 9944^2 .

It is a super-2 number, since 2×997323812² = 1989309571964422688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124665473 + ... + 124665480.

It is an arithmetic number, because the mean of its divisors is an integer number (290886113).

Almost surely, 2^997323812 is an apocalyptic number.

It is an amenable number.

997323812 is a deficient number, since it is larger than the sum of its proper divisors (747992866).

997323812 is a wasteful number, since it uses less digits than its factorization.

997323812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249330957 (or 249330955 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 997323812 is about 31580.4340058841. The cubic root of 997323812 is about 999.1071403723.

The spelling of 997323812 in words is "nine hundred ninety-seven million, three hundred twenty-three thousand, eight hundred twelve".