212623973 has 2 divisors, whose sum is σ = 212623974. Its totient is φ = 212623972.

The previous prime is 212623933. The next prime is 212623993. The reversal of 212623973 is 379326212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200562244 + 12061729 = 14162^2 + 3473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212623973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212623933) 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, 106311986 + 106311987.

It is an arithmetic number, because the mean of its divisors is an integer number (106311987).

Almost surely, 2^212623973 is an apocalyptic number.

It is an amenable number.

212623973 is a deficient number, since it is larger than the sum of its proper divisors (1).

212623973 is an equidigital number, since it uses as much as digits as its factorization.

212623973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 212623973 is about 14581.6313559217. The cubic root of 212623973 is about 596.8576202207.

The spelling of 212623973 in words is "two hundred twelve million, six hundred twenty-three thousand, nine hundred seventy-three".