989879161 has 2 divisors, whose sum is σ = 989879162. Its totient is φ = 989879160.

The previous prime is 989879071. The next prime is 989879183. The reversal of 989879161 is 161978989.

989879161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725979136 + 263900025 = 26944^2 + 16245^2 .

It is a cyclic number.

It is not a de Polignac number, because 989879161 - 2²¹ = 987782009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989879096 and 989879105.

It is not a weakly prime, because it can be changed into another prime (989829161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494939580 + 494939581.

It is an arithmetic number, because the mean of its divisors is an integer number (494939581).

Almost surely, 2^989879161 is an apocalyptic number.

It is an amenable number.

989879161 is a deficient number, since it is larger than the sum of its proper divisors (1).

989879161 is an equidigital number, since it uses as much as digits as its factorization.

989879161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 58.

The square root of 989879161 is about 31462.3451287408. The cubic root of 989879161 is about 996.6149413070.

The spelling of 989879161 in words is "nine hundred eighty-nine million, eight hundred seventy-nine thousand, one hundred sixty-one".