394222847 has 2 divisors, whose sum is σ = 394222848. Its totient is φ = 394222846.

The previous prime is 394222823. The next prime is 394222889. The reversal of 394222847 is 748222493.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394222847 is a prime.

It is a super-3 number, since 3×394222847³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394222817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197111423 + 197111424.

It is an arithmetic number, because the mean of its divisors is an integer number (197111424).

Almost surely, 2^394222847 is an apocalyptic number.

394222847 is a deficient number, since it is larger than the sum of its proper divisors (1).

394222847 is an equidigital number, since it uses as much as digits as its factorization.

394222847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 41.

The square root of 394222847 is about 19855.0458825962. The cubic root of 394222847 is about 733.2418818236.

The spelling of 394222847 in words is "three hundred ninety-four million, two hundred twenty-two thousand, eight hundred forty-seven".