1279790459 has 2 divisors, whose sum is σ = 1279790460. Its totient is φ = 1279790458.

The previous prime is 1279790437. The next prime is 1279790461. The reversal of 1279790459 is 9540979721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1279790459 - 2⁸ = 1279790203 is a prime.

Together with 1279790461, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1279790459.

It is not a weakly prime, because it can be changed into another prime (1279790059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639895229 + 639895230.

It is an arithmetic number, because the mean of its divisors is an integer number (639895230).

Almost surely, 2^1279790459 is an apocalyptic number.

1279790459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279790459 is an equidigital number, since it uses as much as digits as its factorization.

1279790459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1428840, while the sum is 53.

The square root of 1279790459 is about 35774.1590956377. The cubic root of 1279790459 is about 1085.7077953023.

The spelling of 1279790459 in words is "one billion, two hundred seventy-nine million, seven hundred ninety thousand, four hundred fifty-nine".