212429879 has 4 divisors (see below), whose sum is σ = 212990760. Its totient is φ = 211869000.

The previous prime is 212429869. The next prime is 212429923. The reversal of 212429879 is 978924212.

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-212429879 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 (212429849) 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, 279872 + ... + 280629.

It is an arithmetic number, because the mean of its divisors is an integer number (53247690).

Almost surely, 2^212429879 is an apocalyptic number.

212429879 is a deficient number, since it is larger than the sum of its proper divisors (560881).

212429879 is an equidigital number, since it uses as much as digits as its factorization.

212429879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560880.

The product of its digits is 145152, while the sum is 44.

The square root of 212429879 is about 14574.9744082108. The cubic root of 212429879 is about 596.6759509113.

The spelling of 212429879 in words is "two hundred twelve million, four hundred twenty-nine thousand, eight hundred seventy-nine".