212929 has 4 divisors (see below), whose sum is σ = 216000. Its totient is φ = 209860.

The previous prime is 212923. The next prime is 212969. The reversal of 212929 is 929212.

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 not a de Polignac number, because 212929 - 2⁵ = 212897 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1429 + ... + 1570.

It is an arithmetic number, because the mean of its divisors is an integer number (54000).

2²¹²⁹²⁹ is an apocalyptic number.

It is an amenable number.

212929 is a deficient number, since it is larger than the sum of its proper divisors (3071).

212929 is an equidigital number, since it uses as much as digits as its factorization.

212929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070.

The product of its digits is 648, while the sum is 25.

The square root of 212929 is about 461.4423040858. The cubic root of 212929 is about 59.7142898024.

The spelling of 212929 in words is "two hundred twelve thousand, nine hundred twenty-nine".