1279823963 has 4 divisors (see below), whose sum is σ = 1396171608. Its totient is φ = 1163476320.

The previous prime is 1279823953. The next prime is 1279823989. The reversal of 1279823963 is 3693289721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1279823963 - 2¹⁰ = 1279822939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279823953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58173806 + ... + 58173827.

It is an arithmetic number, because the mean of its divisors is an integer number (349042902).

Almost surely, 2^1279823963 is an apocalyptic number.

1279823963 is a deficient number, since it is larger than the sum of its proper divisors (116347645).

1279823963 is a wasteful number, since it uses less digits than its factorization.

1279823963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116347644.

The product of its digits is 979776, while the sum is 50.

The square root of 1279823963 is about 35774.6273635380. The cubic root of 1279823963 is about 1085.7172695712.

The spelling of 1279823963 in words is "one billion, two hundred seventy-nine million, eight hundred twenty-three thousand, nine hundred sixty-three".