82449009 has 10 divisors (see below), whose sum is σ = 123164690. Its totient is φ = 54965952.

The previous prime is 82448983. The next prime is 82449041. The reversal of 82449009 is 90094428.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 50808384 + 31640625 = 7128^2 + 5625^2 .

It is not a de Polignac number, because 82449009 - 2¹¹ = 82446961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82449049) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 508864 + ... + 509025.

It is an arithmetic number, because the mean of its divisors is an integer number (12316469).

Almost surely, 2^82449009 is an apocalyptic number.

It is an amenable number.

82449009 is a deficient number, since it is larger than the sum of its proper divisors (40715681).

82449009 is a wasteful number, since it uses less digits than its factorization.

82449009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017901 (or 1017892 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 82449009 is about 9080.1436662643. The cubic root of 82449009 is about 435.2396776677.

The spelling of 82449009 in words is "eighty-two million, four hundred forty-nine thousand, nine".