394779513 has 16 divisors (see below), whose sum is σ = 543882752. Its totient is φ = 254448000.

The previous prime is 394779503. The next prime is 394779527. The reversal of 394779513 is 315977493.

It is a happy number.

It is not a de Polignac number, because 394779513 - 2⁵ = 394779481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394779503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171933 + ... + 174213.

It is an arithmetic number, because the mean of its divisors is an integer number (33992672).

Almost surely, 2^394779513 is an apocalyptic number.

It is an amenable number.

394779513 is a deficient number, since it is larger than the sum of its proper divisors (149103239).

394779513 is a wasteful number, since it uses less digits than its factorization.

394779513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176.

The product of its digits is 714420, while the sum is 48.

The square root of 394779513 is about 19869.0591875911. The cubic root of 394779513 is about 733.5868464873.

The spelling of 394779513 in words is "three hundred ninety-four million, seven hundred seventy-nine thousand, five hundred thirteen".