997997274 has 40 divisors (see below), whose sum is σ = 2367803988. Its totient is φ = 313096320.

The previous prime is 997997269. The next prime is 997997281. The reversal of 997997274 is 472799799.

It can be written as a sum of positive squares in 2 ways, for example, as 961310025 + 36687249 = 31005^2 + 6057^2 .

It is a super-2 number, since 2×997997274² = 1991997117822862152, which contains 22 as substring.

It is a Curzon number.

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 in 19 ways as a sum of consecutive naturals, for example, 178437 + ... + 183944.

Almost surely, 2^997997274 is an apocalyptic number.

997997274 is an abundant number, since it is smaller than the sum of its proper divisors (1369806714).

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

997997274 is a wasteful number, since it uses less digits than its factorization.

997997274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362412 (or 362403 counting only the distinct ones).

The product of its digits is 18003384, while the sum is 63.

The square root of 997997274 is about 31591.0948528221. The cubic root of 997997274 is about 999.3319785133.

The spelling of 997997274 in words is "nine hundred ninety-seven million, nine hundred ninety-seven thousand, two hundred seventy-four".