1597291996 has 6 divisors (see below), whose sum is σ = 2795261000. Its totient is φ = 798645996.

The previous prime is 1597291991. The next prime is 1597292003. The reversal of 1597291996 is 6991927951.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1597291996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597291991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199661496 + ... + 199661503.

Almost surely, 2^1597291996 is an apocalyptic number.

It is an amenable number.

1597291996 is a deficient number, since it is larger than the sum of its proper divisors (1197969004).

1597291996 is a wasteful number, since it uses less digits than its factorization.

1597291996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399323003 (or 399323001 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 58.

The square root of 1597291996 is about 39966.1356150429. The cubic root of 1597291996 is about 1168.9468683554.

The spelling of 1597291996 in words is "one billion, five hundred ninety-seven million, two hundred ninety-one thousand, nine hundred ninety-six".