1279600667 has 2 divisors, whose sum is σ = 1279600668. Its totient is φ = 1279600666.

The previous prime is 1279600601. The next prime is 1279600717. The reversal of 1279600667 is 7660069721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1279600667 - 2¹⁸ = 1279338523 is a prime.

It is not a weakly prime, because it can be changed into another prime (1279600967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639800333 + 639800334.

It is an arithmetic number, because the mean of its divisors is an integer number (639800334).

Almost surely, 2^1279600667 is an apocalyptic number.

1279600667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279600667 is an equidigital number, since it uses as much as digits as its factorization.

1279600667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 1279600667 is about 35771.5063563166. The cubic root of 1279600667 is about 1085.6541227553.

The spelling of 1279600667 in words is "one billion, two hundred seventy-nine million, six hundred thousand, six hundred sixty-seven".