3994788473 has 4 divisors (see below), whose sum is σ = 4302079908. Its totient is φ = 3687497040.

The previous prime is 3994788467. The next prime is 3994788487. The reversal of 3994788473 is 3748874993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1527480889 + 2467307584 = 39083^2 + 49672^2 .

It is a cyclic number.

It is not a de Polignac number, because 3994788473 - 2⁶ = 3994788409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3994788443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153645698 + ... + 153645723.

It is an arithmetic number, because the mean of its divisors is an integer number (1075519977).

Almost surely, 2^3994788473 is an apocalyptic number.

It is an amenable number.

3994788473 is a deficient number, since it is larger than the sum of its proper divisors (307291435).

3994788473 is a wasteful number, since it uses less digits than its factorization.

3994788473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307291434.

The product of its digits is 36578304, while the sum is 62.

The square root of 3994788473 is about 63204.3390361769. The cubic root of 3994788473 is about 1586.7113537295.

The spelling of 3994788473 in words is "three billion, nine hundred ninety-four million, seven hundred eighty-eight thousand, four hundred seventy-three".