997962831 has 12 divisors (see below), whose sum is σ = 1446864120. Its totient is φ = 662833680.

The previous prime is 997962827. The next prime is 997962851. The reversal of 997962831 is 138269799.

997962831 is a `hidden beast` number, since 9 + 9 + 7 + 9 + 628 + 3 + 1 = 666.

It is not a de Polignac number, because 997962831 - 2² = 997962827 is a prime.

It is a super-2 number, since 2×997962831² = 1991859624115069122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997962851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203685 + ... + 208526.

It is an arithmetic number, because the mean of its divisors is an integer number (120572010).

Almost surely, 2^997962831 is an apocalyptic number.

997962831 is a deficient number, since it is larger than the sum of its proper divisors (448901289).

997962831 is a wasteful number, since it uses less digits than its factorization.

997962831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412486 (or 412483 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 997962831 is about 31590.5497103168. The cubic root of 997962831 is about 999.3204820266.

The spelling of 997962831 in words is "nine hundred ninety-seven million, nine hundred sixty-two thousand, eight hundred thirty-one".