989080681 has 2 divisors, whose sum is σ = 989080682. Its totient is φ = 989080680.

The previous prime is 989080649. The next prime is 989080693. The reversal of 989080681 is 186080989.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631265625 + 357815056 = 25125^2 + 18916^2 .

It is a cyclic number.

It is not a de Polignac number, because 989080681 - 2⁵ = 989080649 is a prime.

It is a super-2 number, since 2×989080681² = 1956561187054847522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989080601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494540340 + 494540341.

It is an arithmetic number, because the mean of its divisors is an integer number (494540341).

Almost surely, 2^989080681 is an apocalyptic number.

It is an amenable number.

989080681 is a deficient number, since it is larger than the sum of its proper divisors (1).

989080681 is an equidigital number, since it uses as much as digits as its factorization.

989080681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 989080681 is about 31449.6531141442. The cubic root of 989080681 is about 996.3468980969.

The spelling of 989080681 in words is "nine hundred eighty-nine million, eighty thousand, six hundred eighty-one".