212903 has 2 divisors, whose sum is σ = 212904. Its totient is φ = 212902.

The previous prime is 212897. The next prime is 212909. The reversal of 212903 is 309212.

It is a balanced prime because it is at equal distance from previous prime (212897) and next prime (212909).

It is a cyclic number.

It is not a de Polignac number, because 212903 - 2¹⁰ = 211879 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212909) 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, 106451 + 106452.

It is an arithmetic number, because the mean of its divisors is an integer number (106452).

2²¹²⁹⁰³ is an apocalyptic number.

212903 is a deficient number, since it is larger than the sum of its proper divisors (1).

212903 is an equidigital number, since it uses as much as digits as its factorization.

212903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 212903 is about 461.4141306896. The cubic root of 212903 is about 59.7118592039.

The spelling of 212903 in words is "two hundred twelve thousand, nine hundred three".