3943431 has 16 divisors (see below), whose sum is σ = 6150400. Its totient is φ = 2490264.

The previous prime is 3943427. The next prime is 3943451. The reversal of 3943431 is 1343493.

It is not a de Polignac number, because 3943431 - 2² = 3943427 is a prime.

It is a super-2 number, since 2×3943431² = 31101296103522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3943395 and 3943404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3943451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3331 + ... + 4356.

It is an arithmetic number, because the mean of its divisors is an integer number (384400).

Almost surely, 2^3943431 is an apocalyptic number.

3943431 is a deficient number, since it is larger than the sum of its proper divisors (2206969).

3943431 is a wasteful number, since it uses less digits than its factorization.

3943431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7715 (or 7709 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 3943431 is about 1985.8073924729. The cubic root of 3943431 is about 157.9882355178.

The spelling of 3943431 in words is "three million, nine hundred forty-three thousand, four hundred thirty-one".