212708723 has 2 divisors, whose sum is σ = 212708724. Its totient is φ = 212708722.

The previous prime is 212708689. The next prime is 212708759. The reversal of 212708723 is 327807212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212708723 - 2¹⁰ = 212707699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212708723.

It is not a weakly prime, because it can be changed into another prime (212708423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106354361 + 106354362.

It is an arithmetic number, because the mean of its divisors is an integer number (106354362).

Almost surely, 2^212708723 is an apocalyptic number.

212708723 is a deficient number, since it is larger than the sum of its proper divisors (1).

212708723 is an equidigital number, since it uses as much as digits as its factorization.

212708723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 212708723 is about 14584.5371198403. The cubic root of 212708723 is about 596.9369103769.

The spelling of 212708723 in words is "two hundred twelve million, seven hundred eight thousand, seven hundred twenty-three".