2163899 has 4 divisors (see below), whose sum is σ = 2196264. Its totient is φ = 2131536.

The previous prime is 2163883. The next prime is 2163911. The reversal of 2163899 is 9983612.

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

It is a cyclic number.

It is not a de Polignac number, because 2163899 - 2⁴ = 2163883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163809) 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, 16082 + ... + 16215.

It is an arithmetic number, because the mean of its divisors is an integer number (549066).

2^2163899 is an apocalyptic number.

2163899 is a deficient number, since it is larger than the sum of its proper divisors (32365).

2163899 is an equidigital number, since it uses as much as digits as its factorization.

2163899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32364.

The product of its digits is 23328, while the sum is 38.

The square root of 2163899 is about 1471.0197143478. The cubic root of 2163899 is about 129.3438137313.

The spelling of 2163899 in words is "two million, one hundred sixty-three thousand, eight hundred ninety-nine".