212344393 has 2 divisors, whose sum is σ = 212344394. Its totient is φ = 212344392.

The previous prime is 212344387. The next prime is 212344397. The reversal of 212344393 is 393443212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133702969 + 78641424 = 11563^2 + 8868^2 .

It is a cyclic number.

It is not a de Polignac number, because 212344393 - 2²¹ = 210247241 is a prime.

It is equal to p_11723809 and since 212344393 and 11723809 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (212344397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106172196 + 106172197.

It is an arithmetic number, because the mean of its divisors is an integer number (106172197).

Almost surely, 2^212344393 is an apocalyptic number.

It is an amenable number.

212344393 is a deficient number, since it is larger than the sum of its proper divisors (1).

212344393 is an equidigital number, since it uses as much as digits as its factorization.

212344393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 31.

The square root of 212344393 is about 14572.0414836083. The cubic root of 212344393 is about 596.5959020904.

The spelling of 212344393 in words is "two hundred twelve million, three hundred forty-four thousand, three hundred ninety-three".