394527563 has 2 divisors, whose sum is σ = 394527564. Its totient is φ = 394527562.

The previous prime is 394527527. The next prime is 394527583. The reversal of 394527563 is 365725493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394527563 - 2¹⁴ = 394511179 is a prime.

It is not a weakly prime, because it can be changed into another prime (394527583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197263781 + 197263782.

It is an arithmetic number, because the mean of its divisors is an integer number (197263782).

Almost surely, 2^394527563 is an apocalyptic number.

394527563 is a deficient number, since it is larger than the sum of its proper divisors (1).

394527563 is an equidigital number, since it uses as much as digits as its factorization.

394527563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 44.

The square root of 394527563 is about 19862.7179157335. The cubic root of 394527563 is about 733.4307538389.

The spelling of 394527563 in words is "three hundred ninety-four million, five hundred twenty-seven thousand, five hundred sixty-three".