900039 has 8 divisors (see below), whose sum is σ = 1371520. Its totient is φ = 514296.

The previous prime is 900037. The next prime is 900061. The reversal of 900039 is 930009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 900039 - 2¹ = 900037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 42859 = 900039 / (9 + 0 + 0 + 0 + 3 + 9).

It is a Duffinian number.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 899988 and 900024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21409 + ... + 21450.

It is an arithmetic number, because the mean of its divisors is an integer number (171440).

2⁹⁰⁰⁰³⁹ is an apocalyptic number.

900039 is a deficient number, since it is larger than the sum of its proper divisors (471481).

900039 is a wasteful number, since it uses less digits than its factorization.

900039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42869.

The product of its (nonzero) digits is 243, while the sum is 21.

The square root of 900039 is about 948.7038526326. The cubic root of 900039 is about 96.5503330362.

The spelling of 900039 in words is "nine hundred thousand, thirty-nine".