212886823 has 2 divisors, whose sum is σ = 212886824. Its totient is φ = 212886822.

The previous prime is 212886803. The next prime is 212886833. The reversal of 212886823 is 328688212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212886823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212886803) 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, 106443411 + 106443412.

It is an arithmetic number, because the mean of its divisors is an integer number (106443412).

Almost surely, 2^212886823 is an apocalyptic number.

212886823 is a deficient number, since it is larger than the sum of its proper divisors (1).

212886823 is an equidigital number, since it uses as much as digits as its factorization.

212886823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 40.

The square root of 212886823 is about 14590.6416240000. The cubic root of 212886823 is about 597.1034680429.

The spelling of 212886823 in words is "two hundred twelve million, eight hundred eighty-six thousand, eight hundred twenty-three".