394142803 has 2 divisors, whose sum is σ = 394142804. Its totient is φ = 394142802.

The previous prime is 394142779. The next prime is 394142813. The reversal of 394142803 is 308241493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394142803 - 2²¹ = 392045651 is a prime.

It is not a weakly prime, because it can be changed into another prime (394142813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197071401 + 197071402.

It is an arithmetic number, because the mean of its divisors is an integer number (197071402).

Almost surely, 2^394142803 is an apocalyptic number.

394142803 is a deficient number, since it is larger than the sum of its proper divisors (1).

394142803 is an equidigital number, since it uses as much as digits as its factorization.

394142803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 394142803 is about 19853.0300709992. The cubic root of 394142803 is about 733.1922520382.

The spelling of 394142803 in words is "three hundred ninety-four million, one hundred forty-two thousand, eight hundred three".