3949431 has 8 divisors (see below), whose sum is σ = 5435904. Its totient is φ = 2547960.

The previous prime is 3949411. The next prime is 3949433. The reversal of 3949431 is 1349493.

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

It is not a de Polignac number, because 3949431 - 2⁶ = 3949367 is a prime.

It is a super-2 number, since 2×3949431² = 31196010447522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3949392 and 3949401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3949433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21141 + ... + 21326.

It is an arithmetic number, because the mean of its divisors is an integer number (679488).

Almost surely, 2^3949431 is an apocalyptic number.

3949431 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3949431 is a deficient number, since it is larger than the sum of its proper divisors (1486473).

3949431 is a wasteful number, since it uses less digits than its factorization.

3949431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42501.

The product of its digits is 11664, while the sum is 33.

The square root of 3949431 is about 1987.3175387944. The cubic root of 3949431 is about 158.0683222118.

The spelling of 3949431 in words is "three million, nine hundred forty-nine thousand, four hundred thirty-one".