989959 has 2 divisors, whose sum is σ = 989960. Its totient is φ = 989958.

The previous prime is 989951. The next prime is 989971. The reversal of 989959 is 959989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989959 - 2³ = 989951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989951) 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, 494979 + 494980.

It is an arithmetic number, because the mean of its divisors is an integer number (494980).

2⁹⁸⁹⁹⁵⁹ is an apocalyptic number.

989959 is a deficient number, since it is larger than the sum of its proper divisors (1).

989959 is an equidigital number, since it uses as much as digits as its factorization.

989959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 49.

The square root of 989959 is about 994.9668336181. The cubic root of 989959 is about 99.6641734679.

The spelling of 989959 in words is "nine hundred eighty-nine thousand, nine hundred fifty-nine".