988309 has 8 divisors (see below), whose sum is σ = 1149120. Its totient is φ = 832416.

The previous prime is 988297. The next prime is 988313. The reversal of 988309 is 903889.

988309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 988309 - 2⁹ = 987797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988319) 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, 784 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2⁹⁸⁸³⁰⁹ is an apocalyptic number.

It is an amenable number.

988309 is a deficient number, since it is larger than the sum of its proper divisors (160811).

988309 is a wasteful number, since it uses less digits than its factorization.

988309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 988309 is about 994.1373144591. The cubic root of 988309 is about 99.6087713979.

The spelling of 988309 in words is "nine hundred eighty-eight thousand, three hundred nine".