1399352849 has 4 divisors (see below), whose sum is σ = 1399470564. Its totient is φ = 1399235136.

The previous prime is 1399352813. The next prime is 1399352923. The reversal of 1399352849 is 9482539931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 678967249 + 720385600 = 26057^2 + 26840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399352849 - 2²⁰ = 1398304273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1399352849.

It is not an unprimeable number, because it can be changed into a prime (1399352249) 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, 38732 + ... + 65565.

It is an arithmetic number, because the mean of its divisors is an integer number (349867641).

Almost surely, 2^1399352849 is an apocalyptic number.

It is an amenable number.

1399352849 is a deficient number, since it is larger than the sum of its proper divisors (117715).

1399352849 is a wasteful number, since it uses less digits than its factorization.

1399352849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117714.

The product of its digits is 2099520, while the sum is 53.

The square root of 1399352849 is about 37407.9249491334. The cubic root of 1399352849 is about 1118.5165439274.

The spelling of 1399352849 in words is "one billion, three hundred ninety-nine million, three hundred fifty-two thousand, eight hundred forty-nine".