394705247 has 2 divisors, whose sum is σ = 394705248. Its totient is φ = 394705246.

The previous prime is 394705229. The next prime is 394705261. The reversal of 394705247 is 742507493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394705247 - 2¹⁴ = 394688863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394705147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197352623 + 197352624.

It is an arithmetic number, because the mean of its divisors is an integer number (197352624).

Almost surely, 2^394705247 is an apocalyptic number.

394705247 is a deficient number, since it is larger than the sum of its proper divisors (1).

394705247 is an equidigital number, since it uses as much as digits as its factorization.

394705247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 394705247 is about 19867.1902140187. The cubic root of 394705247 is about 733.5408427682.

The spelling of 394705247 in words is "three hundred ninety-four million, seven hundred five thousand, two hundred forty-seven".