1399687117 has 16 divisors (see below), whose sum is σ = 1526241600. Its totient is φ = 1278547200.

The previous prime is 1399687111. The next prime is 1399687139. The reversal of 1399687117 is 7117869931.

It is a cyclic number.

It is not a de Polignac number, because 1399687117 - 2⁷ = 1399686989 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 (1399687111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577893 + ... + 580309.

It is an arithmetic number, because the mean of its divisors is an integer number (95390100).

Almost surely, 2^1399687117 is an apocalyptic number.

It is an amenable number.

1399687117 is a deficient number, since it is larger than the sum of its proper divisors (126554483).

1399687117 is a wasteful number, since it uses less digits than its factorization.

1399687117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516.

The product of its digits is 571536, while the sum is 52.

The square root of 1399687117 is about 37412.3925591508. The cubic root of 1399687117 is about 1118.6055980741.

The spelling of 1399687117 in words is "one billion, three hundred ninety-nine million, six hundred eighty-seven thousand, one hundred seventeen".