989761 has 2 divisors, whose sum is σ = 989762. Its totient is φ = 989760.

The previous prime is 989753. The next prime is 989777. The reversal of 989761 is 167989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 680625 + 309136 = 825^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 989761 - 2³ = 989753 is a prime.

It is not a weakly prime, because it can be changed into another prime (989561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494880 + 494881.

It is an arithmetic number, because the mean of its divisors is an integer number (494881).

2⁹⁸⁹⁷⁶¹ is an apocalyptic number.

It is an amenable number.

989761 is a deficient number, since it is larger than the sum of its proper divisors (1).

989761 is an equidigital number, since it uses as much as digits as its factorization.

989761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 989761 is about 994.8673278382. The cubic root of 989761 is about 99.6575284714.

The spelling of 989761 in words is "nine hundred eighty-nine thousand, seven hundred sixty-one".