212866879 has 2 divisors, whose sum is σ = 212866880. Its totient is φ = 212866878.

The previous prime is 212866837. The next prime is 212866889. The reversal of 212866879 is 978668212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212866879 - 2¹³ = 212858687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212866889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106433439 + 106433440.

It is an arithmetic number, because the mean of its divisors is an integer number (106433440).

Almost surely, 2^212866879 is an apocalyptic number.

212866879 is a deficient number, since it is larger than the sum of its proper divisors (1).

212866879 is an equidigital number, since it uses as much as digits as its factorization.

212866879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 212866879 is about 14589.9581562114. The cubic root of 212866879 is about 597.0848211968.

The spelling of 212866879 in words is "two hundred twelve million, eight hundred sixty-six thousand, eight hundred seventy-nine".