1279599967 has 2 divisors, whose sum is σ = 1279599968. Its totient is φ = 1279599966.

The previous prime is 1279599943. The next prime is 1279600061. The reversal of 1279599967 is 7699959721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1279599967 - 2¹¹ = 1279597919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1279599899 and 1279599908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1279599767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639799983 + 639799984.

It is an arithmetic number, because the mean of its divisors is an integer number (639799984).

Almost surely, 2^1279599967 is an apocalyptic number.

1279599967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1279599967 is an equidigital number, since it uses as much as digits as its factorization.

1279599967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19289340, while the sum is 64.

The square root of 1279599967 is about 35771.4965719915. The cubic root of 1279599967 is about 1085.6539247878.

It can be divided in two parts, 127959996 and 7, that added together give a triangular number (127960003 = T₁₅₉₉₇).

The spelling of 1279599967 in words is "one billion, two hundred seventy-nine million, five hundred ninety-nine thousand, nine hundred sixty-seven".