11123239979 has 2 divisors, whose sum is σ = 11123239980. Its totient is φ = 11123239978.

The previous prime is 11123239949. The next prime is 11123240003. The reversal of 11123239979 is 97993232111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123239979 is a prime.

It is not a weakly prime, because it can be changed into another prime (11123239949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561619989 + 5561619990.

It is an arithmetic number, because the mean of its divisors is an integer number (5561619990).

Almost surely, 2^11123239979 is an apocalyptic number.

11123239979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123239979 is an equidigital number, since it uses as much as digits as its factorization.

11123239979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 47.

The spelling of 11123239979 in words is "eleven billion, one hundred twenty-three million, two hundred thirty-nine thousand, nine hundred seventy-nine".