940039 has 4 divisors (see below), whose sum is σ = 943056. Its totient is φ = 937024.

The previous prime is 940031. The next prime is 940067. The reversal of 940039 is 930049.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930049 = 139 ⋅6691.

It is a 6-Lehmer number, since φ(940039) divides (940039-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 940039 - 2³ = 940031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 939995 and 940022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940031) 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, 979 + ... + 1684.

It is an arithmetic number, because the mean of its divisors is an integer number (235764).

2⁹⁴⁰⁰³⁹ is an apocalyptic number.

940039 is a deficient number, since it is larger than the sum of its proper divisors (3017).

940039 is a wasteful number, since it uses less digits than its factorization.

940039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3016.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 940039 is about 969.5560839890. The cubic root of 940039 is about 97.9599655996.

The spelling of 940039 in words is "nine hundred forty thousand, thirty-nine".