992439009 has 9 divisors (see below), whose sum is σ = 1433659539. Its totient is φ = 661563000.

The previous prime is 992438999. The next prime is 992439037. The reversal of 992439009 is 900934299.

The square root of 992439009 is 31503.

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

It can be written as a sum of positive squares in only one way, i.e., 292307409 + 700131600 = 17097^2 + 26460^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 992439009 - 2¹¹ = 992436961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (992439509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 89259 + ... + 99759.

Almost surely, 2^992439009 is an apocalyptic number.

992439009 is the 31503-rd square number.

992439009 is the 15752-nd centered octagonal number.

It is an amenable number.

992439009 is a deficient number, since it is larger than the sum of its proper divisors (441220530).

992439009 is an frugal number, since it uses more digits than its factorization.

992439009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21008 (or 10504 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The cubic root of 992439009 is about 997.4732907843.

The spelling of 992439009 in words is "nine hundred ninety-two million, four hundred thirty-nine thousand, nine".