3966694 has 4 divisors (see below), whose sum is σ = 5950044. Its totient is φ = 1983346.

The previous prime is 3966691. The next prime is 3966701. The reversal of 3966694 is 4966693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4966693 = 521 ⋅9533.

It is a super-2 number, since 2×3966694² = 31469322579272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3966694.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991672 + ... + 991675.

It is an arithmetic number, because the mean of its divisors is an integer number (1487511).

Almost surely, 2^3966694 is an apocalyptic number.

3966694 is a deficient number, since it is larger than the sum of its proper divisors (1983350).

3966694 is a wasteful number, since it uses less digits than its factorization.

3966694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983349.

The product of its digits is 209952, while the sum is 43.

The square root of 3966694 is about 1991.6560948116. The cubic root of 3966694 is about 158.2982935080.

Subtracting 3966694 from its reverse (4966693), we obtain a palindrome (999999).

The spelling of 3966694 in words is "three million, nine hundred sixty-six thousand, six hundred ninety-four".