212785879 has 2 divisors, whose sum is σ = 212785880. Its totient is φ = 212785878.

The previous prime is 212785823. The next prime is 212785897. The reversal of 212785879 is 978587212.

Together with next prime (212785897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212785879 - 2¹³ = 212777687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212785679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106392939 + 106392940.

It is an arithmetic number, because the mean of its divisors is an integer number (106392940).

Almost surely, 2^212785879 is an apocalyptic number.

212785879 is a deficient number, since it is larger than the sum of its proper divisors (1).

212785879 is an equidigital number, since it uses as much as digits as its factorization.

212785879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 49.

The square root of 212785879 is about 14587.1820102445. The cubic root of 212785879 is about 597.0090774479.

The spelling of 212785879 in words is "two hundred twelve million, seven hundred eighty-five thousand, eight hundred seventy-nine".