1399585705 has 16 divisors (see below), whose sum is σ = 1920720384. Its totient is φ = 959071680.

The previous prime is 1399585703. The next prime is 1399585709. The reversal of 1399585705 is 5075859931.

It is not a de Polignac number, because 1399585705 - 2¹ = 1399585703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399585703) 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, 42775 + ... + 68035.

It is an arithmetic number, because the mean of its divisors is an integer number (120045024).

Almost surely, 2^1399585705 is an apocalyptic number.

It is an amenable number.

1399585705 is a deficient number, since it is larger than the sum of its proper divisors (521134679).

1399585705 is a wasteful number, since it uses less digits than its factorization.

1399585705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26856.

The product of its (nonzero) digits is 1701000, while the sum is 52.

The square root of 1399585705 is about 37411.0372082892. The cubic root of 1399585705 is about 1118.5785818528.

The spelling of 1399585705 in words is "one billion, three hundred ninety-nine million, five hundred eighty-five thousand, seven hundred five".