11199985 has 4 divisors (see below), whose sum is σ = 13439988. Its totient is φ = 8959984.

The previous prime is 11199977. The next prime is 11199989. The reversal of 11199985 is 58999111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3538161 + 7661824 = 1881^2 + 2768^2 .

It is a cyclic number.

It is not a de Polignac number, because 11199985 - 2³ = 11199977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11199989) 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, 1119994 + ... + 1120003.

It is an arithmetic number, because the mean of its divisors is an integer number (3359997).

Almost surely, 2^11199985 is an apocalyptic number.

It is an amenable number.

11199985 is a deficient number, since it is larger than the sum of its proper divisors (2240003).

11199985 is an equidigital number, since it uses as much as digits as its factorization.

11199985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240002.

The product of its digits is 29160, while the sum is 43.

The square root of 11199985 is about 3346.6378650819. The cubic root of 11199985 is about 223.7376885333.

The spelling of 11199985 in words is "eleven million, one hundred ninety-nine thousand, nine hundred eighty-five".