394642603 has 2 divisors, whose sum is σ = 394642604. Its totient is φ = 394642602.

The previous prime is 394642513. The next prime is 394642621. The reversal of 394642603 is 306246493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394642603 - 2¹³ = 394634411 is a prime.

It is not a weakly prime, because it can be changed into another prime (394642693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197321301 + 197321302.

It is an arithmetic number, because the mean of its divisors is an integer number (197321302).

Almost surely, 2^394642603 is an apocalyptic number.

394642603 is a deficient number, since it is larger than the sum of its proper divisors (1).

394642603 is an equidigital number, since it uses as much as digits as its factorization.

394642603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 37.

The square root of 394642603 is about 19865.6135822682. The cubic root of 394642603 is about 733.5020337547.

The spelling of 394642603 in words is "three hundred ninety-four million, six hundred forty-two thousand, six hundred three".