1279839941 has 2 divisors, whose sum is σ = 1279839942. Its totient is φ = 1279839940.

The previous prime is 1279839901. The next prime is 1279839961. The reversal of 1279839941 is 1499389721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 772284100 + 507555841 = 27790^2 + 22529^2 .

It is a cyclic number.

It is not a de Polignac number, because 1279839941 - 2³⁰ = 206098117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279839901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639919970 + 639919971.

It is an arithmetic number, because the mean of its divisors is an integer number (639919971).

Almost surely, 2^1279839941 is an apocalyptic number.

It is an amenable number.

1279839941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279839941 is an equidigital number, since it uses as much as digits as its factorization.

1279839941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 53.

The square root of 1279839941 is about 35774.8506775360. The cubic root of 1279839941 is about 1085.7217877755.

The spelling of 1279839941 in words is "one billion, two hundred seventy-nine million, eight hundred thirty-nine thousand, nine hundred forty-one".