988517 has 4 divisors (see below), whose sum is σ = 1031520. Its totient is φ = 945516.

The previous prime is 988511. The next prime is 988541. The reversal of 988517 is 715889.

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 988517 - 2⁴ = 988501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21467 + ... + 21512.

It is an arithmetic number, because the mean of its divisors is an integer number (257880).

2⁹⁸⁸⁵¹⁷ is an apocalyptic number.

It is an amenable number.

988517 is a deficient number, since it is larger than the sum of its proper divisors (43003).

988517 is a wasteful number, since it uses less digits than its factorization.

988517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43002.

The product of its digits is 20160, while the sum is 38.

The square root of 988517 is about 994.2419222704. The cubic root of 988517 is about 99.6157588114.

The spelling of 988517 in words is "nine hundred eighty-eight thousand, five hundred seventeen".