1158317879 has 4 divisors (see below), whose sum is σ = 1158387480. Its totient is φ = 1158248280.

The previous prime is 1158317873. The next prime is 1158317887. The reversal of 1158317879 is 9787138511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1158317879 - 2⁴ = 1158317863 is a prime.

It is a super-2 number, since 2×1158317879² = 2683400617622117282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158317873) 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, 6509 + ... + 48569.

It is an arithmetic number, because the mean of its divisors is an integer number (289596870).

Almost surely, 2^1158317879 is an apocalyptic number.

1158317879 is a deficient number, since it is larger than the sum of its proper divisors (69601).

1158317879 is an equidigital number, since it uses as much as digits as its factorization.

1158317879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69600.

The product of its digits is 423360, while the sum is 50.

The square root of 1158317879 is about 34034.0693864251. The cubic root of 1158317879 is about 1050.2094454448.

The spelling of 1158317879 in words is "one billion, one hundred fifty-eight million, three hundred seventeen thousand, eight hundred seventy-nine".