1158879889 has 2 divisors, whose sum is σ = 1158879890. Its totient is φ = 1158879888.

The previous prime is 1158879877. The next prime is 1158879941. The reversal of 1158879889 is 9889788511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 819104400 + 339775489 = 28620^2 + 18433^2 .

It is an emirp because it is prime and its reverse (9889788511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1158879889 - 2⁵ = 1158879857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1158879889.

It is not a weakly prime, because it can be changed into another prime (1158879809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579439944 + 579439945.

It is an arithmetic number, because the mean of its divisors is an integer number (579439945).

Almost surely, 2^1158879889 is an apocalyptic number.

It is an amenable number.

1158879889 is a deficient number, since it is larger than the sum of its proper divisors (1).

1158879889 is an equidigital number, since it uses as much as digits as its factorization.

1158879889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 64.

The square root of 1158879889 is about 34042.3249646671. The cubic root of 1158879889 is about 1050.3792700926.

The spelling of 1158879889 in words is "one billion, one hundred fifty-eight million, eight hundred seventy-nine thousand, eight hundred eighty-nine".