1597157889 has 16 divisors (see below), whose sum is σ = 2142669312. Its totient is φ = 1058226048.

The previous prime is 1597157867. The next prime is 1597157893. The reversal of 1597157889 is 9887517951.

It is a happy number.

It is not a de Polignac number, because 1597157889 - 2⁵ = 1597157857 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1597157819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488749 + ... + 492005.

It is an arithmetic number, because the mean of its divisors is an integer number (133916832).

Almost surely, 2^1597157889 is an apocalyptic number.

It is an amenable number.

1597157889 is a deficient number, since it is larger than the sum of its proper divisors (545511423).

1597157889 is a wasteful number, since it uses less digits than its factorization.

1597157889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4216.

The product of its digits is 6350400, while the sum is 60.

The square root of 1597157889 is about 39964.4578219197. The cubic root of 1597157889 is about 1168.9141529126.

The spelling of 1597157889 in words is "one billion, five hundred ninety-seven million, one hundred fifty-seven thousand, eight hundred eighty-nine".