212287879 has 2 divisors, whose sum is σ = 212287880. Its totient is φ = 212287878.

The previous prime is 212287849. The next prime is 212287883. The reversal of 212287879 is 978782212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212287879 - 2²¹ = 210190727 is a prime.

It is a super-2 number, since 2×212287879² = 90132287140637282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212287819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106143939 + 106143940.

It is an arithmetic number, because the mean of its divisors is an integer number (106143940).

Almost surely, 2^212287879 is an apocalyptic number.

212287879 is a deficient number, since it is larger than the sum of its proper divisors (1).

212287879 is an equidigital number, since it uses as much as digits as its factorization.

212287879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 46.

The square root of 212287879 is about 14570.1022302522. The cubic root of 212287879 is about 596.5429707621.

The spelling of 212287879 in words is "two hundred twelve million, two hundred eighty-seven thousand, eight hundred seventy-nine".