989725 has 24 divisors (see below), whose sum is σ = 1383840. Its totient is φ = 696000.

The previous prime is 989719. The next prime is 989743. The reversal of 989725 is 527989.

It is a de Polignac number, because none of the positive numbers 2^k-989725 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 16195 + ... + 16255.

It is an arithmetic number, because the mean of its divisors is an integer number (57660).

2⁹⁸⁹⁷²⁵ is an apocalyptic number.

It is an amenable number.

989725 is a deficient number, since it is larger than the sum of its proper divisors (394115).

989725 is a wasteful number, since it uses less digits than its factorization.

989725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 136 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 989725 is about 994.8492348090. The cubic root of 989725 is about 99.6563201951.

The spelling of 989725 in words is "nine hundred eighty-nine thousand, seven hundred twenty-five".