989745 has 8 divisors (see below), whose sum is σ = 1583616. Its totient is φ = 527856.

The previous prime is 989743. The next prime is 989749. The reversal of 989745 is 547989.

989745 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 not a de Polignac number, because 989745 - 2¹ = 989743 is a prime.

It is a Curzon number.

989745 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 989697 and 989706.

It is not an unprimeable number, because it can be changed into a prime (989743) 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, 32977 + ... + 33006.

It is an arithmetic number, because the mean of its divisors is an integer number (197952).

2⁹⁸⁹⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

989745 is a deficient number, since it is larger than the sum of its proper divisors (593871).

989745 is a wasteful number, since it uses less digits than its factorization.

989745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65991.

The product of its digits is 90720, while the sum is 42.

The square root of 989745 is about 994.8592865325. The cubic root of 989745 is about 99.6569914633.

The spelling of 989745 in words is "nine hundred eighty-nine thousand, seven hundred forty-five".