1121493979 has 2 divisors, whose sum is σ = 1121493980. Its totient is φ = 1121493978.

The previous prime is 1121493977. The next prime is 1121494009. The reversal of 1121493979 is 9793941211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121493979 - 2¹ = 1121493977 is a prime.

Together with 1121493977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1121493977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560746989 + 560746990.

It is an arithmetic number, because the mean of its divisors is an integer number (560746990).

Almost surely, 2^1121493979 is an apocalyptic number.

1121493979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121493979 is an equidigital number, since it uses as much as digits as its factorization.

1121493979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 46.

The square root of 1121493979 is about 33488.7142034447. The cubic root of 1121493979 is about 1038.9603698013.

The spelling of 1121493979 in words is "one billion, one hundred twenty-one million, four hundred ninety-three thousand, nine hundred seventy-nine".