4039869 has 4 divisors (see below), whose sum is σ = 5386496. Its totient is φ = 2693244.

The previous prime is 4039843. The next prime is 4039873. The reversal of 4039869 is 9689304.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4039869 - 2⁷ = 4039741 is a prime.

It is a super-2 number, since 2×4039869² = 32641083074322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4039069) 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, 673309 + ... + 673314.

It is an arithmetic number, because the mean of its divisors is an integer number (1346624).

Almost surely, 2^4039869 is an apocalyptic number.

It is an amenable number.

4039869 is a deficient number, since it is larger than the sum of its proper divisors (1346627).

4039869 is a wasteful number, since it uses less digits than its factorization.

4039869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346626.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 4039869 is about 2009.9425364920. The cubic root of 4039869 is about 159.2657633617.

The spelling of 4039869 in words is "four million, thirty-nine thousand, eight hundred sixty-nine".