1165023489 has 8 divisors (see below), whose sum is σ = 1775273920. Its totient is φ = 665727696.

The previous prime is 1165023473. The next prime is 1165023521. The reversal of 1165023489 is 9843205611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1165023489 - 2⁴ = 1165023473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1165023449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27738634 + ... + 27738675.

It is an arithmetic number, because the mean of its divisors is an integer number (221909240).

Almost surely, 2^1165023489 is an apocalyptic number.

It is an amenable number.

1165023489 is a deficient number, since it is larger than the sum of its proper divisors (610250431).

1165023489 is an equidigital number, since it uses as much as digits as its factorization.

1165023489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55477319.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 1165023489 is about 34132.4404196360. The cubic root of 1165023489 is about 1052.2321340131.

The spelling of 1165023489 in words is "one billion, one hundred sixty-five million, twenty-three thousand, four hundred eighty-nine".