212194847 has 2 divisors, whose sum is σ = 212194848. Its totient is φ = 212194846.

The previous prime is 212194819. The next prime is 212194859. The reversal of 212194847 is 748491212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212194847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212194847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212194447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106097423 + 106097424.

It is an arithmetic number, because the mean of its divisors is an integer number (106097424).

Almost surely, 2^212194847 is an apocalyptic number.

212194847 is a deficient number, since it is larger than the sum of its proper divisors (1).

212194847 is an equidigital number, since it uses as much as digits as its factorization.

212194847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 212194847 is about 14566.9093152940. The cubic root of 212194847 is about 596.4558160065.

The spelling of 212194847 in words is "two hundred twelve million, one hundred ninety-four thousand, eight hundred forty-seven".