1597442091 has 12 divisors (see below), whose sum is σ = 2477665512. Its totient is φ = 912823968.

The previous prime is 1597442089. The next prime is 1597442167. The reversal of 1597442091 is 1902447951.

It is not a de Polignac number, because 1597442091 - 2¹ = 1597442089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1597442191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5433330 + ... + 5433623.

It is an arithmetic number, because the mean of its divisors is an integer number (206472126).

Almost surely, 2^1597442091 is an apocalyptic number.

1597442091 is a deficient number, since it is larger than the sum of its proper divisors (880223421).

1597442091 is a wasteful number, since it uses less digits than its factorization.

1597442091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10866970 (or 10866963 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1597442091 is about 39968.0133481763. The cubic root of 1597442091 is about 1168.9834819041.

The spelling of 1597442091 in words is "one billion, five hundred ninety-seven million, four hundred forty-two thousand, ninety-one".