394761939 has 32 divisors (see below), whose sum is σ = 620277504. Its totient is φ = 220164480.

The previous prime is 394761937. The next prime is 394761943. The reversal of 394761939 is 939167493.

It is not a de Polignac number, because 394761939 - 2¹ = 394761937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394761891 and 394761900.

It is not an unprimeable number, because it can be changed into a prime (394761937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158784 + ... + 161250.

It is an arithmetic number, because the mean of its divisors is an integer number (19383672).

Almost surely, 2^394761939 is an apocalyptic number.

394761939 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

394761939 is a deficient number, since it is larger than the sum of its proper divisors (225515565).

394761939 is a wasteful number, since it uses less digits than its factorization.

394761939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867.

The product of its digits is 1102248, while the sum is 51.

The square root of 394761939 is about 19868.6169372707. The cubic root of 394761939 is about 733.5759608780.

The spelling of 394761939 in words is "three hundred ninety-four million, seven hundred sixty-one thousand, nine hundred thirty-nine".