989873 has 2 divisors, whose sum is σ = 989874. Its totient is φ = 989872.

The previous prime is 989869. The next prime is 989887. The reversal of 989873 is 378989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954529 + 35344 = 977^2 + 188^2 .

It is a cyclic number.

It is not a de Polignac number, because 989873 - 2² = 989869 is a prime.

It is a super-2 number, since 2×989873² = 1959697112258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989803) 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 as a sum of consecutive naturals, namely, 494936 + 494937.

It is an arithmetic number, because the mean of its divisors is an integer number (494937).

2⁹⁸⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

989873 is a deficient number, since it is larger than the sum of its proper divisors (1).

989873 is an equidigital number, since it uses as much as digits as its factorization.

989873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 989873 is about 994.9236151585. The cubic root of 989873 is about 99.6612873662.

The spelling of 989873 in words is "nine hundred eighty-nine thousand, eight hundred seventy-three".