1108979689 has 2 divisors, whose sum is σ = 1108979690. Its totient is φ = 1108979688.

The previous prime is 1108979657. The next prime is 1108979713. The reversal of 1108979689 is 9869798011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 733976464 + 375003225 = 27092^2 + 19365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1108979689 - 2⁵ = 1108979657 is a prime.

It is a super-2 number, since 2×1108979689² = 2459671901229073442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1108979609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554489844 + 554489845.

It is an arithmetic number, because the mean of its divisors is an integer number (554489845).

Almost surely, 2^1108979689 is an apocalyptic number.

It is an amenable number.

1108979689 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108979689 is an equidigital number, since it uses as much as digits as its factorization.

1108979689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 58.

The square root of 1108979689 is about 33301.3466544523. The cubic root of 1108979689 is about 1035.0814623116.

The spelling of 1108979689 in words is "one billion, one hundred eight million, nine hundred seventy-nine thousand, six hundred eighty-nine".