1868199 has 8 divisors (see below), whose sum is σ = 2519280. Its totient is φ = 1231296.

The previous prime is 1868189. The next prime is 1868201. The reversal of 1868199 is 9918681.

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

It is not a de Polignac number, because 1868199 - 2⁴ = 1868183 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1868199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3232 + ... + 3765.

It is an arithmetic number, because the mean of its divisors is an integer number (314910).

2^1868199 is an apocalyptic number.

1868199 is a deficient number, since it is larger than the sum of its proper divisors (651081).

1868199 is an equidigital number, since it uses as much as digits as its factorization.

1868199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089.

The product of its digits is 31104, while the sum is 42.

The square root of 1868199 is about 1366.8207636702. The cubic root of 1868199 is about 123.1613323512.

It can be divided in two parts, 186 and 8199, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 1868199 in words is "one million, eight hundred sixty-eight thousand, one hundred ninety-nine".