989739 has 12 divisors (see below), whose sum is σ = 1482936. Its totient is φ = 659664.

The previous prime is 989719. The next prime is 989743. The reversal of 989739 is 937989.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-989739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989694 and 989703.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989739.

It is not an unprimeable number, because it can be changed into a prime (989719) 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 11 ways as a sum of consecutive naturals, for example, 1794 + ... + 2279.

It is an arithmetic number, because the mean of its divisors is an integer number (123578).

2⁹⁸⁹⁷³⁹ is an apocalyptic number.

989739 is a deficient number, since it is larger than the sum of its proper divisors (493197).

989739 is an equidigital number, since it uses as much as digits as its factorization.

989739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088 (or 4076 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 989739 is about 994.8562710261. The cubic root of 989739 is about 99.6567900838.

It can be divided in two parts, 989 and 739, that added together give a cube (1728 = 12³).

The spelling of 989739 in words is "nine hundred eighty-nine thousand, seven hundred thirty-nine".