1158979539 has 16 divisors (see below), whose sum is σ = 1663943040. Its totient is φ = 714875520.

The previous prime is 1158979501. The next prime is 1158979543. The reversal of 1158979539 is 9359798511.

It is not a de Polignac number, because 1158979539 - 2⁷ = 1158979411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1158979589) 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, 189577 + ... + 195594.

It is an arithmetic number, because the mean of its divisors is an integer number (103996440).

Almost surely, 2^1158979539 is an apocalyptic number.

1158979539 is a deficient number, since it is larger than the sum of its proper divisors (504963501).

1158979539 is a wasteful number, since it uses less digits than its factorization.

1158979539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385250.

The product of its digits is 3061800, while the sum is 57.

The square root of 1158979539 is about 34043.7885523923. The cubic root of 1158979539 is about 1050.4093759719.

The spelling of 1158979539 in words is "one billion, one hundred fifty-eight million, nine hundred seventy-nine thousand, five hundred thirty-nine".