997297147 has 24 divisors (see below), whose sum is σ = 1269153792. Its totient is φ = 774925200.

The previous prime is 997297139. The next prime is 997297159. The reversal of 997297147 is 741792799.

It is not a de Polignac number, because 997297147 - 2³ = 997297139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997292147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204022 + ... + 208852.

It is an arithmetic number, because the mean of its divisors is an integer number (52881408).

Almost surely, 2^997297147 is an apocalyptic number.

997297147 is a deficient number, since it is larger than the sum of its proper divisors (271856645).

997297147 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (997297146) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (5232).

997297147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5239 (or 5232 counting only the distinct ones).

The product of its digits is 2000376, while the sum is 55.

The square root of 997297147 is about 31580.0118271035. The cubic root of 997297147 is about 999.0982360662.

The spelling of 997297147 in words is "nine hundred ninety-seven million, two hundred ninety-seven thousand, one hundred forty-seven".