1597159791 has 6 divisors (see below), whose sum is σ = 2307008600. Its totient is φ = 1064773188.

The previous prime is 1597159783. The next prime is 1597159799. The reversal of 1597159791 is 1979517951.

It is an interprime number because it is at equal distance from previous prime (1597159783) and next prime (1597159799).

It is not a de Polignac number, because 1597159791 - 2³ = 1597159783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597159799) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88731091 + ... + 88731108.

Almost surely, 2^1597159791 is an apocalyptic number.

1597159791 is a deficient number, since it is larger than the sum of its proper divisors (709848809).

1597159791 is a wasteful number, since it uses less digits than its factorization.

1597159791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177462205 (or 177462202 counting only the distinct ones).

The product of its digits is 893025, while the sum is 54.

The square root of 1597159791 is about 39964.4816180568. The cubic root of 1597159791 is about 1168.9146169188.

The spelling of 1597159791 in words is "one billion, five hundred ninety-seven million, one hundred fifty-nine thousand, seven hundred ninety-one".