213899 has 4 divisors (see below), whose sum is σ = 244464. Its totient is φ = 183336.

The previous prime is 213887. The next prime is 213901. The reversal of 213899 is 998312.

213899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213899 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213899.

It is not an unprimeable number, because it can be changed into a prime (213859) 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, 15272 + ... + 15285.

It is an arithmetic number, because the mean of its divisors is an integer number (61116).

2²¹³⁸⁹⁹ is an apocalyptic number.

213899 is a deficient number, since it is larger than the sum of its proper divisors (30565).

213899 is an equidigital number, since it uses as much as digits as its factorization.

213899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30564.

The product of its digits is 3888, while the sum is 32.

The square root of 213899 is about 462.4921620957. The cubic root of 213899 is about 59.8048287880.

The spelling of 213899 in words is "two hundred thirteen thousand, eight hundred ninety-nine".