1399616859 has 4 divisors (see below), whose sum is σ = 1866155816. Its totient is φ = 933077904.

The previous prime is 1399616857. The next prime is 1399616887. The reversal of 1399616859 is 9586169931.

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

It is not a de Polignac number, because 1399616859 - 2¹ = 1399616857 is a prime.

It is a super-3 number, since 3×1399616859³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1399616799 and 1399616808.

It is not an unprimeable number, because it can be changed into a prime (1399616857) 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, 233269474 + ... + 233269479.

It is an arithmetic number, because the mean of its divisors is an integer number (466538954).

Almost surely, 2^1399616859 is an apocalyptic number.

1399616859 is a deficient number, since it is larger than the sum of its proper divisors (466538957).

1399616859 is an equidigital number, since it uses as much as digits as its factorization.

1399616859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466538956.

The product of its digits is 3149280, while the sum is 57.

The square root of 1399616859 is about 37411.4535804211. The cubic root of 1399616859 is about 1118.5868814371.

The spelling of 1399616859 in words is "one billion, three hundred ninety-nine million, six hundred sixteen thousand, eight hundred fifty-nine".