3994791 has 4 divisors (see below), whose sum is σ = 5326392. Its totient is φ = 2663192.

The previous prime is 3994789. The next prime is 3994799. The reversal of 3994791 is 1974993.

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

It is a cyclic number.

It is not a de Polignac number, because 3994791 - 2¹ = 3994789 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3994799) 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, 665796 + ... + 665801.

It is an arithmetic number, because the mean of its divisors is an integer number (1331598).

Almost surely, 2^3994791 is an apocalyptic number.

3994791 is a deficient number, since it is larger than the sum of its proper divisors (1331601).

3994791 is a wasteful number, since it uses less digits than its factorization.

3994791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331600.

The product of its digits is 61236, while the sum is 42.

The square root of 3994791 is about 1998.6973257600. The cubic root of 3994791 is about 158.6711688300.

It can be divided in two parts, 39 and 94791, that added together give a triangular number (94830 = T₄₃₅).

The spelling of 3994791 in words is "three million, nine hundred ninety-four thousand, seven hundred ninety-one".