997680969 has 48 divisors (see below), whose sum is σ = 1546100160. Its totient is φ = 643345416.

The previous prime is 997680949. The next prime is 997680977. The reversal of 997680969 is 969086799.

It is not a de Polignac number, because 997680969 - 2¹² = 997676873 is a prime.

It is a super-2 number, since 2×997680969² = 1990734631809557922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (997680949) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 9686172 + ... + 9686274.

It is an arithmetic number, because the mean of its divisors is an integer number (32210420).

Almost surely, 2^997680969 is an apocalyptic number.

It is an amenable number.

997680969 is a deficient number, since it is larger than the sum of its proper divisors (548419191).

997680969 is an frugal number, since it uses more digits than its factorization.

997680969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The square root of 997680969 is about 31586.0882193411. The cubic root of 997680969 is about 999.2263913507.

The spelling of 997680969 in words is "nine hundred ninety-seven million, six hundred eighty thousand, nine hundred sixty-nine".