3931243 has 4 divisors (see below), whose sum is σ = 3948640. Its totient is φ = 3913848.

The previous prime is 3931241. The next prime is 3931247. The reversal of 3931243 is 3421393.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3931243 - 2¹ = 3931241 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (3931241) 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, 8355 + ... + 8812.

It is an arithmetic number, because the mean of its divisors is an integer number (987160).

Almost surely, 2^3931243 is an apocalyptic number.

3931243 is a deficient number, since it is larger than the sum of its proper divisors (17397).

3931243 is a wasteful number, since it uses less digits than its factorization.

3931243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17396.

The product of its digits is 1944, while the sum is 25.

The square root of 3931243 is about 1982.7362406533. The cubic root of 3931243 is about 157.8253022911.

The spelling of 3931243 in words is "three million, nine hundred thirty-one thousand, two hundred forty-three".