212906293 has 2 divisors, whose sum is σ = 212906294. Its totient is φ = 212906292.

The previous prime is 212906269. The next prime is 212906299. The reversal of 212906293 is 392609212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121837444 + 91068849 = 11038^2 + 9543^2 .

It is a cyclic number.

It is not a de Polignac number, because 212906293 - 2⁵ = 212906261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212906299) 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, 106453146 + 106453147.

It is an arithmetic number, because the mean of its divisors is an integer number (106453147).

Almost surely, 2^212906293 is an apocalyptic number.

It is an amenable number.

212906293 is a deficient number, since it is larger than the sum of its proper divisors (1).

212906293 is an equidigital number, since it uses as much as digits as its factorization.

212906293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 212906293 is about 14591.3088172377. The cubic root of 212906293 is about 597.1216705945.

The spelling of 212906293 in words is "two hundred twelve million, nine hundred six thousand, two hundred ninety-three".