212893 has 4 divisors (see below), whose sum is σ = 217888. Its totient is φ = 207900.

The previous prime is 212881. The next prime is 212897. The reversal of 212893 is 398212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2433 + ... + 2518.

It is an arithmetic number, because the mean of its divisors is an integer number (54472).

2²¹²⁸⁹³ is an apocalyptic number.

It is an amenable number.

212893 is a deficient number, since it is larger than the sum of its proper divisors (4995).

212893 is an equidigital number, since it uses as much as digits as its factorization.

212893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4994.

The product of its digits is 864, while the sum is 25.

The square root of 212893 is about 461.4032943099. The cubic root of 212893 is about 59.7109243056.

The spelling of 212893 in words is "two hundred twelve thousand, eight hundred ninety-three".