212803879 has 2 divisors, whose sum is σ = 212803880. Its totient is φ = 212803878.

The previous prime is 212803837. The next prime is 212803897. The reversal of 212803879 is 978308212.

212803879 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (212803897) 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 a de Polignac number, because none of the positive numbers 2^k-212803879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212863879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106401939 + 106401940.

It is an arithmetic number, because the mean of its divisors is an integer number (106401940).

Almost surely, 2^212803879 is an apocalyptic number.

212803879 is a deficient number, since it is larger than the sum of its proper divisors (1).

212803879 is an equidigital number, since it uses as much as digits as its factorization.

212803879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 212803879 is about 14587.7989772275. The cubic root of 212803879 is about 597.0259110531.

The spelling of 212803879 in words is "two hundred twelve million, eight hundred three thousand, eight hundred seventy-nine".