3967431 has 16 divisors (see below), whose sum is σ = 5945856. Its totient is φ = 2334816.

The previous prime is 3967429. The next prime is 3967441. The reversal of 3967431 is 1347693.

It is not a de Polignac number, because 3967431 - 2¹ = 3967429 is a prime.

It is a super-2 number, since 2×3967431² = 31481017479522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3967392 and 3967401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967441) 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, 1315 + ... + 3108.

It is an arithmetic number, because the mean of its divisors is an integer number (371616).

Almost surely, 2^3967431 is an apocalyptic number.

3967431 is a deficient number, since it is larger than the sum of its proper divisors (1978425).

3967431 is a wasteful number, since it uses less digits than its factorization.

3967431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462.

The product of its digits is 13608, while the sum is 33.

The square root of 3967431 is about 1991.8411081208. The cubic root of 3967431 is about 158.3080966857.

The spelling of 3967431 in words is "three million, nine hundred sixty-seven thousand, four hundred thirty-one".