989719 has 2 divisors, whose sum is σ = 989720. Its totient is φ = 989718.

The previous prime is 989687. The next prime is 989743. The reversal of 989719 is 917989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989719 - 2⁵ = 989687 is a prime.

It is a super-2 number, since 2×989719² = 1959087397922, which contains 22 as substring.

989719 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494859 + 494860.

It is an arithmetic number, because the mean of its divisors is an integer number (494860).

2⁹⁸⁹⁷¹⁹ is an apocalyptic number.

989719 is a deficient number, since it is larger than the sum of its proper divisors (1).

989719 is an equidigital number, since it uses as much as digits as its factorization.

989719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 43.

The square root of 989719 is about 994.8462192721. The cubic root of 989719 is about 99.6561188128.

The spelling of 989719 in words is "nine hundred eighty-nine thousand, seven hundred nineteen".