1997459316 has 36 divisors (see below), whose sum is σ = 5074524000. Its totient is φ = 662471568.

The previous prime is 1997459309. The next prime is 1997459351. The reversal of 1997459316 is 6139547991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 132246 + ... + 146573.

It is an arithmetic number, because the mean of its divisors is an integer number (140959000).

Almost surely, 2^1997459316 is an apocalyptic number.

It is an amenable number.

1997459316 is an abundant number, since it is smaller than the sum of its proper divisors (3077064684).

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

1997459316 is a wasteful number, since it uses less digits than its factorization.

1997459316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279028 (or 279023 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 1997459316 is about 44692.9448123527. The cubic root of 1997459316 is about 1259.3873136130.

The spelling of 1997459316 in words is "one billion, nine hundred ninety-seven million, four hundred fifty-nine thousand, three hundred sixteen".