1321163279 has 8 divisors (see below), whose sum is σ = 1428643008. Its totient is φ = 1216990720.

The previous prime is 1321163273. The next prime is 1321163293. The reversal of 1321163279 is 9723611231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321163279 - 2⁸ = 1321163023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321163273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825962 + ... + 827559.

It is an arithmetic number, because the mean of its divisors is an integer number (178580376).

Almost surely, 2^1321163279 is an apocalyptic number.

1321163279 is a deficient number, since it is larger than the sum of its proper divisors (107479729).

1321163279 is a wasteful number, since it uses less digits than its factorization.

1321163279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653585.

The product of its digits is 13608, while the sum is 35.

The square root of 1321163279 is about 36347.8098239770. The cubic root of 1321163279 is about 1097.2834562906.

The spelling of 1321163279 in words is "one billion, three hundred twenty-one million, one hundred sixty-three thousand, two hundred seventy-nine".