3966431 has 4 divisors (see below), whose sum is σ = 4533072. Its totient is φ = 3399792.

The previous prime is 3966409. The next prime is 3966433. The reversal of 3966431 is 1346693.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3966431 is a prime.

It is a super-2 number, since 2×3966431² = 31465149755522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3966433) 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, 283310 + ... + 283323.

It is an arithmetic number, because the mean of its divisors is an integer number (1133268).

Almost surely, 2^3966431 is an apocalyptic number.

3966431 is a deficient number, since it is larger than the sum of its proper divisors (566641).

3966431 is an equidigital number, since it uses as much as digits as its factorization.

3966431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566640.

The product of its digits is 11664, while the sum is 32.

The square root of 3966431 is about 1991.5900682620. The cubic root of 3966431 is about 158.2947949295.

The spelling of 3966431 in words is "three million, nine hundred sixty-six thousand, four hundred thirty-one".