1399113263 has 4 divisors (see below), whose sum is σ = 1422049608. Its totient is φ = 1376176920.

The previous prime is 1399113251. The next prime is 1399113283. The reversal of 1399113263 is 3623119931.

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 1399113263 - 2²⁴ = 1382336047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399113283) 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, 11468081 + ... + 11468202.

It is an arithmetic number, because the mean of its divisors is an integer number (355512402).

Almost surely, 2^1399113263 is an apocalyptic number.

1399113263 is a deficient number, since it is larger than the sum of its proper divisors (22936345).

1399113263 is an equidigital number, since it uses as much as digits as its factorization.

1399113263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22936344.

The product of its digits is 26244, while the sum is 38.

The square root of 1399113263 is about 37404.7224692284. The cubic root of 1399113263 is about 1118.4527057992.

The spelling of 1399113263 in words is "one billion, three hundred ninety-nine million, one hundred thirteen thousand, two hundred sixty-three".