1145997589 has 4 divisors (see below), whose sum is σ = 1250179200. Its totient is φ = 1041815980.

The previous prime is 1145997577. The next prime is 1145997607. The reversal of 1145997589 is 9857995411.

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 a cyclic number.

It is not a de Polignac number, because 1145997589 - 2¹¹ = 1145995541 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 (1145997509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52090789 + ... + 52090810.

It is an arithmetic number, because the mean of its divisors is an integer number (312544800).

Almost surely, 2^1145997589 is an apocalyptic number.

It is an amenable number.

1145997589 is a deficient number, since it is larger than the sum of its proper divisors (104181611).

1145997589 is a wasteful number, since it uses less digits than its factorization.

1145997589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104181610.

The product of its digits is 4082400, while the sum is 58.

The square root of 1145997589 is about 33852.5861493624. The cubic root of 1145997589 is about 1046.4726956849.

The spelling of 1145997589 in words is "one billion, one hundred forty-five million, nine hundred ninety-seven thousand, five hundred eighty-nine".