394779503 has 2 divisors, whose sum is σ = 394779504. Its totient is φ = 394779502.

The previous prime is 394779493. The next prime is 394779527. The reversal of 394779503 is 305977493.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394779503 - 2⁸ = 394779247 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 (394779403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197389751 + 197389752.

It is an arithmetic number, because the mean of its divisors is an integer number (197389752).

Almost surely, 2^394779503 is an apocalyptic number.

394779503 is a deficient number, since it is larger than the sum of its proper divisors (1).

394779503 is an equidigital number, since it uses as much as digits as its factorization.

394779503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 714420, while the sum is 47.

The square root of 394779503 is about 19869.0589359436. The cubic root of 394779503 is about 733.5868402932.

The spelling of 394779503 in words is "three hundred ninety-four million, seven hundred seventy-nine thousand, five hundred three".