1279479679 has 2 divisors, whose sum is σ = 1279479680. Its totient is φ = 1279479678.

The previous prime is 1279479659. The next prime is 1279479683. The reversal of 1279479679 is 9769749721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1279479679 - 2²⁷ = 1145261951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279479629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639739839 + 639739840.

It is an arithmetic number, because the mean of its divisors is an integer number (639739840).

Almost surely, 2^1279479679 is an apocalyptic number.

1279479679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279479679 is an equidigital number, since it uses as much as digits as its factorization.

1279479679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12002256, while the sum is 61.

The square root of 1279479679 is about 35769.8151938195. The cubic root of 1279479679 is about 1085.6199049809.

The spelling of 1279479679 in words is "one billion, two hundred seventy-nine million, four hundred seventy-nine thousand, six hundred seventy-nine".