3992239 has 4 divisors (see below), whose sum is σ = 3999424. Its totient is φ = 3985056.

The previous prime is 3992231. The next prime is 3992243. The reversal of 3992239 is 9322993.

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 3992239 - 2³ = 3992231 is a prime.

It is a Duffinian number.

3992239 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3992198 and 3992207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992231) 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, 2682 + ... + 3895.

It is an arithmetic number, because the mean of its divisors is an integer number (999856).

Almost surely, 2^3992239 is an apocalyptic number.

3992239 is a deficient number, since it is larger than the sum of its proper divisors (7185).

3992239 is an equidigital number, since it uses as much as digits as its factorization.

3992239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7184.

The product of its digits is 26244, while the sum is 37.

The square root of 3992239 is about 1998.0588079433. The cubic root of 3992239 is about 158.6373735634.

The spelling of 3992239 in words is "three million, nine hundred ninety-two thousand, two hundred thirty-nine".