997297146 has 48 divisors (see below), whose sum is σ = 2291575104. Its totient is φ = 312377472.

The previous prime is 997297139. The next prime is 997297159. The reversal of 997297146 is 641792799.

It is a junction number, because it is equal to n+sod(n) for n = 997297092 and 997297101.

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 23 ways as a sum of consecutive naturals, for example, 220221 + ... + 224703.

It is an arithmetic number, because the mean of its divisors is an integer number (47741148).

Almost surely, 2^997297146 is an apocalyptic number.

997297146 is an abundant number, since it is smaller than the sum of its proper divisors (1294277958).

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

997297146 is a wasteful number, since it uses less digits than its factorization.

With its successor (997297147) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (5232).

997297146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5235 (or 5232 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 997297146 is about 31580.0118112707. The cubic root of 997297146 is about 999.0982357323.

The spelling of 997297146 in words is "nine hundred ninety-seven million, two hundred ninety-seven thousand, one hundred forty-six".