1399084985 has 8 divisors (see below), whose sum is σ = 1687602120. Its totient is φ = 1113467904.

The previous prime is 1399084957. The next prime is 1399084991. The reversal of 1399084985 is 5894809931.

It can be written as a sum of positive squares in 4 ways, for example, as 78198649 + 1320886336 = 8843^2 + 36344^2 .

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 1399084985 - 2¹⁶ = 1399019449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1399084985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 723950 + ... + 725879.

It is an arithmetic number, because the mean of its divisors is an integer number (210950265).

Almost surely, 2^1399084985 is an apocalyptic number.

It is an amenable number.

1399084985 is a deficient number, since it is larger than the sum of its proper divisors (288517135).

1399084985 is a wasteful number, since it uses less digits than its factorization.

1399084985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450027.

The product of its (nonzero) digits is 2799360, while the sum is 56.

The square root of 1399084985 is about 37404.3444669199. The cubic root of 1399084985 is about 1118.4451705935.

The spelling of 1399084985 in words is "one billion, three hundred ninety-nine million, eighty-four thousand, nine hundred eighty-five".