989677 has 4 divisors (see below), whose sum is σ = 1065820. Its totient is φ = 913536.

The previous prime is 989671. The next prime is 989687. The reversal of 989677 is 776989.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 776989 = 239 ⋅3251.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 443556 = 739^2 + 666^2 .

It is not a de Polignac number, because 989677 - 2¹⁵ = 956909 is a prime.

It is a Duffinian number.

989677 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38052 + ... + 38077.

It is an arithmetic number, because the mean of its divisors is an integer number (266455).

2⁹⁸⁹⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

989677 is a deficient number, since it is larger than the sum of its proper divisors (76143).

989677 is a wasteful number, since it uses less digits than its factorization.

989677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76142.

The product of its digits is 190512, while the sum is 46.

The square root of 989677 is about 994.8251102581. The cubic root of 989677 is about 99.6547091143.

The spelling of 989677 in words is "nine hundred eighty-nine thousand, six hundred seventy-seven".