989542849 has 9 divisors (see below), whose sum is σ = 1004258433. Its totient is φ = 975041172.

The previous prime is 989542811. The next prime is 989542859. The reversal of 989542849 is 948245989.

The square root of 989542849 is 31457.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 989542849 - 2¹⁷ = 989411777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 989542793 and 989542802.

It is not an unprimeable number, because it can be changed into a prime (989542859) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2610742 + ... + 2611120.

Almost surely, 2^989542849 is an apocalyptic number.

989542849 is the 31457-th square number.

989542849 is the 15729-th centered octagonal number.

It is an amenable number.

989542849 is a deficient number, since it is larger than the sum of its proper divisors (14715584).

989542849 is an frugal number, since it uses more digits than its factorization.

989542849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924 (or 462 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 58.

The cubic root of 989542849 is about 996.5020616940.

The spelling of 989542849 in words is "nine hundred eighty-nine million, five hundred forty-two thousand, eight hundred forty-nine".