998903 has 8 divisors (see below), whose sum is σ = 1074672. Its totient is φ = 925056.

The previous prime is 998897. The next prime is 998909. The reversal of 998903 is 309899.

It is an interprime number because it is at equal distance from previous prime (998897) and next prime (998909).

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

It is a cyclic number.

It is not a de Polignac number, because 998903 - 2⁶ = 998839 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998909) 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, 701 + ... + 1577.

It is an arithmetic number, because the mean of its divisors is an integer number (134334).

2⁹⁹⁸⁹⁰³ is an apocalyptic number.

998903 is a deficient number, since it is larger than the sum of its proper divisors (75769).

998903 is a wasteful number, since it uses less digits than its factorization.

998903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961.

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

The square root of 998903 is about 999.4513494913. The cubic root of 998903 is about 99.9634199540.

The spelling of 998903 in words is "nine hundred ninety-eight thousand, nine hundred three".