1940039 has 4 divisors (see below), whose sum is σ = 1951824. Its totient is φ = 1928256.

The previous prime is 1939999. The next prime is 1940041. The reversal of 1940039 is 9300491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9300491 = 353 ⋅26347.

It is a cyclic number.

It is not a de Polignac number, because 1940039 - 2¹⁶ = 1874503 is a prime.

It is an Ulam 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 (1940069) 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, 5642 + ... + 5975.

It is an arithmetic number, because the mean of its divisors is an integer number (487956).

2^1940039 is an apocalyptic number.

1940039 is a deficient number, since it is larger than the sum of its proper divisors (11785).

1940039 is a wasteful number, since it uses less digits than its factorization.

1940039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11784.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1940039 is about 1392.8528278321. The cubic root of 1940039 is about 124.7202061907.

The spelling of 1940039 in words is "one million, nine hundred forty thousand, thirty-nine".