3966951 has 4 divisors (see below), whose sum is σ = 5289272. Its totient is φ = 2644632.

The previous prime is 3966929. The next prime is 3966961. The reversal of 3966951 is 1596693.

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

It is not a de Polignac number, because 3966951 - 2⁶ = 3966887 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966961) 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, 661156 + ... + 661161.

It is an arithmetic number, because the mean of its divisors is an integer number (1322318).

Almost surely, 2^3966951 is an apocalyptic number.

3966951 is a deficient number, since it is larger than the sum of its proper divisors (1322321).

3966951 is a wasteful number, since it uses less digits than its factorization.

3966951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322320.

The product of its digits is 43740, while the sum is 39.

The square root of 3966951 is about 1991.7206129375. The cubic root of 3966951 is about 158.3017121217.

The spelling of 3966951 in words is "three million, nine hundred sixty-six thousand, nine hundred fifty-one".