212429279 has 2 divisors, whose sum is σ = 212429280. Its totient is φ = 212429278.

The previous prime is 212429257. The next prime is 212429281. The reversal of 212429279 is 972924212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212429279 is a prime.

It is a Sophie Germain prime.

Together with 212429281, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212429299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106214639 + 106214640.

It is an arithmetic number, because the mean of its divisors is an integer number (106214640).

Almost surely, 2^212429279 is an apocalyptic number.

212429279 is a deficient number, since it is larger than the sum of its proper divisors (1).

212429279 is an equidigital number, since it uses as much as digits as its factorization.

212429279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 212429279 is about 14574.9538249697. The cubic root of 212429279 is about 596.6753891480.

The spelling of 212429279 in words is "two hundred twelve million, four hundred twenty-nine thousand, two hundred seventy-nine".