3969431 has 8 divisors (see below), whose sum is σ = 4046064. Its totient is φ = 3893760.

The previous prime is 3969421. The next prime is 3969437. The reversal of 3969431 is 1349693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3969431 - 2⁶ = 3969367 is a prime.

It is a super-2 number, since 2×3969431² = 31512764927522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3969391 and 3969400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20471 + ... + 20663.

It is an arithmetic number, because the mean of its divisors is an integer number (505758).

Almost surely, 2^3969431 is an apocalyptic number.

3969431 is a deficient number, since it is larger than the sum of its proper divisors (76633).

3969431 is a wasteful number, since it uses less digits than its factorization.

3969431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481.

The product of its digits is 17496, while the sum is 35.

The square root of 3969431 is about 1992.3430929436. The cubic root of 3969431 is about 158.3346934940.

The spelling of 3969431 in words is "three million, nine hundred sixty-nine thousand, four hundred thirty-one".