903989 has 4 divisors (see below), whose sum is σ = 925056. Its totient is φ = 882924.

The previous prime is 903979. The next prime is 904019. The reversal of 903989 is 989309.

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 a cyclic number.

It is not a de Polignac number, because 903989 - 2¹² = 899893 is a prime.

It is a super-2 number, since 2×903989² = 1634392224242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (903919) 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, 10469 + ... + 10554.

It is an arithmetic number, because the mean of its divisors is an integer number (231264).

2⁹⁰³⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

903989 is a deficient number, since it is larger than the sum of its proper divisors (21067).

903989 is a wasteful number, since it uses less digits than its factorization.

903989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21066.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 903989 is about 950.7833612343. The cubic root of 903989 is about 96.6913703543.

The spelling of 903989 in words is "nine hundred three thousand, nine hundred eighty-nine".