212983 has 4 divisors (see below), whose sum is σ = 213928. Its totient is φ = 212040.

The previous prime is 212981. The next prime is 212987. The reversal of 212983 is 389212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212983 - 2¹ = 212981 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is the 462-nd Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212981) by changing a digit.

It is a nontrivial repunit in base 461.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88 + ... + 658.

It is an arithmetic number, because the mean of its divisors is an integer number (53482).

2²¹²⁹⁸³ is an apocalyptic number.

212983 is a deficient number, since it is larger than the sum of its proper divisors (945).

212983 is an equidigital number, since it uses as much as digits as its factorization.

212983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944.

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

The square root of 212983 is about 461.5008125670. The cubic root of 212983 is about 59.7193373364.

The spelling of 212983 in words is "two hundred twelve thousand, nine hundred eighty-three".