212979 has 16 divisors (see below), whose sum is σ = 315392. Its totient is φ = 127008.

The previous prime is 212969. The next prime is 212981. The reversal of 212979 is 979212.

212979 is nontrivially palindromic in base 2 and base 4.

It is not a de Polignac number, because 212979 - 2⁷ = 212851 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (212909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1614 + ... + 1740.

It is an arithmetic number, because the mean of its divisors is an integer number (19712).

2²¹²⁹⁷⁹ is an apocalyptic number.

212979 is a deficient number, since it is larger than the sum of its proper divisors (102413).

212979 is a wasteful number, since it uses less digits than its factorization.

212979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its digits is 2268, while the sum is 30.

The square root of 212979 is about 461.4964788598. The cubic root of 212979 is about 59.7189634742.

The spelling of 212979 in words is "two hundred twelve thousand, nine hundred seventy-nine".