212090447 has 2 divisors, whose sum is σ = 212090448. Its totient is φ = 212090446.

The previous prime is 212090423. The next prime is 212090449. The reversal of 212090447 is 744090212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212090447 - 2¹⁸ = 211828303 is a prime.

Together with 212090449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212090449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106045223 + 106045224.

It is an arithmetic number, because the mean of its divisors is an integer number (106045224).

Almost surely, 2^212090447 is an apocalyptic number.

212090447 is a deficient number, since it is larger than the sum of its proper divisors (1).

212090447 is an equidigital number, since it uses as much as digits as its factorization.

212090447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 212090447 is about 14563.3254100841. The cubic root of 212090447 is about 596.3579810792.

The spelling of 212090447 in words is "two hundred twelve million, ninety thousand, four hundred forty-seven".