1122249979 has 2 divisors, whose sum is σ = 1122249980. Its totient is φ = 1122249978.

The previous prime is 1122249967. The next prime is 1122250009. The reversal of 1122249979 is 9799422211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1122249979 - 2²⁷ = 988032251 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122249959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561124989 + 561124990.

It is an arithmetic number, because the mean of its divisors is an integer number (561124990).

Almost surely, 2^1122249979 is an apocalyptic number.

1122249979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122249979 is an equidigital number, since it uses as much as digits as its factorization.

1122249979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 1122249979 is about 33499.9996865672. Note that the first 3 decimals coincide. The cubic root of 1122249979 is about 1039.1937720393.

The spelling of 1122249979 in words is "one billion, one hundred twenty-two million, two hundred forty-nine thousand, nine hundred seventy-nine".