1999711085 has 8 divisors (see below), whose sum is σ = 2402617056. Its totient is φ = 1597793040.

The previous prime is 1999711073. The next prime is 1999711093. The reversal of 1999711085 is 5801179991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1999711085 - 2¹⁴ = 1999694701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242519 + ... + 250628.

It is an arithmetic number, because the mean of its divisors is an integer number (300327132).

Almost surely, 2^1999711085 is an apocalyptic number.

It is an amenable number.

1999711085 is a deficient number, since it is larger than the sum of its proper divisors (402905971).

1999711085 is an equidigital number, since it uses as much as digits as its factorization.

1999711085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493963.

The product of its (nonzero) digits is 204120, while the sum is 50.

The square root of 1999711085 is about 44718.1292654333. The cubic root of 1999711085 is about 1259.8603786250.

The spelling of 1999711085 in words is "one billion, nine hundred ninety-nine million, seven hundred eleven thousand, eighty-five".