394989527 has 2 divisors, whose sum is σ = 394989528. Its totient is φ = 394989526.

The previous prime is 394989521. The next prime is 394989571. The reversal of 394989527 is 725989493.

It is a weak prime.

It is an emirp because it is prime and its reverse (725989493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394989527 - 2¹⁸ = 394727383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394989521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197494763 + 197494764.

It is an arithmetic number, because the mean of its divisors is an integer number (197494764).

Almost surely, 2^394989527 is an apocalyptic number.

394989527 is a deficient number, since it is larger than the sum of its proper divisors (1).

394989527 is an equidigital number, since it uses as much as digits as its factorization.

394989527 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 56.

The square root of 394989527 is about 19874.3434356962. The cubic root of 394989527 is about 733.7169074382.

The spelling of 394989527 in words is "three hundred ninety-four million, nine hundred eighty-nine thousand, five hundred twenty-seven".