1904039 has 4 divisors (see below), whose sum is σ = 1906800. Its totient is φ = 1901280.

The previous prime is 1904029. The next prime is 1904041. The reversal of 1904039 is 9304091.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9304091 = 19 ⋅489689.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1904039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1903999 and 1904017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904029) 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, 662 + ... + 2060.

It is an arithmetic number, because the mean of its divisors is an integer number (476700).

2^1904039 is an apocalyptic number.

1904039 is a deficient number, since it is larger than the sum of its proper divisors (2761).

1904039 is a wasteful number, since it uses less digits than its factorization.

1904039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760.

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

The square root of 1904039 is about 1379.8691966995. The cubic root of 1904039 is about 123.9439349391.

The spelling of 1904039 in words is "one million, nine hundred four thousand, thirty-nine".