998711 has 4 divisors (see below), whose sum is σ = 1141392. Its totient is φ = 856032.

The previous prime is 998689. The next prime is 998717. The reversal of 998711 is 117899.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998711 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998717) 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, 71330 + ... + 71343.

It is an arithmetic number, because the mean of its divisors is an integer number (285348).

2⁹⁹⁸⁷¹¹ is an apocalyptic number.

998711 is a deficient number, since it is larger than the sum of its proper divisors (142681).

998711 is a wasteful number, since it uses less digits than its factorization.

998711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142680.

The product of its digits is 4536, while the sum is 35.

The square root of 998711 is about 999.3552921759. The cubic root of 998711 is about 99.9570148588.

The spelling of 998711 in words is "nine hundred ninety-eight thousand, seven hundred eleven".