1997316964 has 12 divisors (see below), whose sum is σ = 3647274624. Its totient is φ = 955238504.

The previous prime is 1997316953. The next prime is 1997316973. The reversal of 1997316964 is 4696137991.

It is a happy 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, 10854892 + ... + 10855075.

It is an arithmetic number, because the mean of its divisors is an integer number (303939552).

Almost surely, 2^1997316964 is an apocalyptic number.

It is an amenable number.

1997316964 is a deficient number, since it is larger than the sum of its proper divisors (1649957660).

1997316964 is a wasteful number, since it uses less digits than its factorization.

1997316964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21709994 (or 21709992 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 55.

The square root of 1997316964 is about 44691.3522283674. The cubic root of 1997316964 is about 1259.3573955132.

The spelling of 1997316964 in words is "one billion, nine hundred ninety-seven million, three hundred sixteen thousand, nine hundred sixty-four".