980551989 has 12 divisors (see below), whose sum is σ = 1416624300. Its totient is φ = 653576064.

The previous prime is 980551969. The next prime is 980551997. The reversal of 980551989 is 989155089.

980551989 is a `hidden beast` number, since 9 + 8 + 0 + 551 + 9 + 89 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 508141764 + 472410225 = 22542^2 + 21735^2 .

It is not a de Polignac number, because 980551989 - 2⁷ = 980551861 is a prime.

It is a super-2 number, since 2×980551989² = 1922964406263712242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980551909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87307 + ... + 97895.

It is an arithmetic number, because the mean of its divisors is an integer number (118052025).

Almost surely, 2^980551989 is an apocalyptic number.

It is an amenable number.

980551989 is a deficient number, since it is larger than the sum of its proper divisors (436072311).

980551989 is a wasteful number, since it uses less digits than its factorization.

980551989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20884 (or 20881 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 54.

The square root of 980551989 is about 31313.7667647953. The cubic root of 980551989 is about 993.4748446226.

The spelling of 980551989 in words is "nine hundred eighty million, five hundred fifty-one thousand, nine hundred eighty-nine".