1157598489 has 4 divisors (see below), whose sum is σ = 1543464656. Its totient is φ = 771732324.

The previous prime is 1157598479. The next prime is 1157598509. The reversal of 1157598489 is 9848957511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1157598489 - 2¹⁹ = 1157074201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1157598419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192933079 + ... + 192933084.

It is an arithmetic number, because the mean of its divisors is an integer number (385866164).

Almost surely, 2^1157598489 is an apocalyptic number.

It is an amenable number.

1157598489 is a deficient number, since it is larger than the sum of its proper divisors (385866167).

1157598489 is an equidigital number, since it uses as much as digits as its factorization.

1157598489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385866166.

The product of its digits is 3628800, while the sum is 57.

The square root of 1157598489 is about 34023.4990704954. The cubic root of 1157598489 is about 1049.9919845193.

The spelling of 1157598489 in words is "one billion, one hundred fifty-seven million, five hundred ninety-eight thousand, four hundred eighty-nine".