1246791979 has 2 divisors, whose sum is σ = 1246791980. Its totient is φ = 1246791978.

The previous prime is 1246791977. The next prime is 1246791991. The reversal of 1246791979 is 9791976421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1246791979 - 2¹ = 1246791977 is a prime.

Together with 1246791977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1246791977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623395989 + 623395990.

It is an arithmetic number, because the mean of its divisors is an integer number (623395990).

Almost surely, 2^1246791979 is an apocalyptic number.

1246791979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246791979 is an equidigital number, since it uses as much as digits as its factorization.

1246791979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 55.

The square root of 1246791979 is about 35309.9416453780. The cubic root of 1246791979 is about 1076.2950259832.

The spelling of 1246791979 in words is "one billion, two hundred forty-six million, seven hundred ninety-one thousand, nine hundred seventy-nine".