997091976 has 32 divisors (see below), whose sum is σ = 2534983200. Its totient is φ = 326730240.

The previous prime is 997091971. The next prime is 997091989. The reversal of 997091976 is 679190799.

It is not an unprimeable number, because it can be changed into a prime (997091971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350665 + ... + 353496.

It is an arithmetic number, because the mean of its divisors is an integer number (79218225).

Almost surely, 2^997091976 is an apocalyptic number.

It is an amenable number.

997091976 is an abundant number, since it is smaller than the sum of its proper divisors (1537891224).

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

997091976 is a wasteful number, since it uses less digits than its factorization.

997091976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704229 (or 704225 counting only the distinct ones).

The product of its (nonzero) digits is 1928934, while the sum is 57.

The square root of 997091976 is about 31576.7632286781. The cubic root of 997091976 is about 999.0297175231.

The spelling of 997091976 in words is "nine hundred ninety-seven million, ninety-one thousand, nine hundred seventy-six".