1997297268 has 12 divisors (see below), whose sum is σ = 4660360320. Its totient is φ = 665765752.

The previous prime is 1997297257. The next prime is 1997297279. The reversal of 1997297268 is 8627927991.

It is an interprime number because it is at equal distance from previous prime (1997297257) and next prime (1997297279).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83220708 + ... + 83220731.

It is an arithmetic number, because the mean of its divisors is an integer number (388363360).

Almost surely, 2^1997297268 is an apocalyptic number.

It is an amenable number.

1997297268 is an abundant number, since it is smaller than the sum of its proper divisors (2663063052).

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

1997297268 is a wasteful number, since it uses less digits than its factorization.

1997297268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166441446 (or 166441444 counting only the distinct ones).

The product of its digits is 6858432, while the sum is 60.

The square root of 1997297268 is about 44691.1318719945. The cubic root of 1997297268 is about 1259.3532558957.

The spelling of 1997297268 in words is "one billion, nine hundred ninety-seven million, two hundred ninety-seven thousand, two hundred sixty-eight".