1279394068 has 12 divisors (see below), whose sum is σ = 2261108052. Its totient is φ = 633363200.

The previous prime is 1279394057. The next prime is 1279394071. The reversal of 1279394068 is 8604939721.

It can be written as a sum of positive squares in 2 ways, for example, as 1053132304 + 226261764 = 32452^2 + 15042^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1583005 + ... + 1583812.

It is an arithmetic number, because the mean of its divisors is an integer number (188425671).

Almost surely, 2^1279394068 is an apocalyptic number.

It is an amenable number.

1279394068 is a deficient number, since it is larger than the sum of its proper divisors (981713984).

1279394068 is a wasteful number, since it uses less digits than its factorization.

1279394068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3166922 (or 3166920 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 1279394068 is about 35768.6184804502. The cubic root of 1279394068 is about 1085.5956912112.

The spelling of 1279394068 in words is "one billion, two hundred seventy-nine million, three hundred ninety-four thousand, sixty-eight".