82485509 has 4 divisors (see below), whose sum is σ = 83716704. Its totient is φ = 81254316.

The previous prime is 82485503. The next prime is 82485523. The reversal of 82485509 is 90558428.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82485509 - 2⁴ = 82485493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82485503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615497 + ... + 615630.

It is an arithmetic number, because the mean of its divisors is an integer number (20929176).

Almost surely, 2^82485509 is an apocalyptic number.

It is an amenable number.

82485509 is a deficient number, since it is larger than the sum of its proper divisors (1231195).

82485509 is a wasteful number, since it uses less digits than its factorization.

82485509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231194.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 82485509 is about 9082.1533239645. The cubic root of 82485509 is about 435.3038947506.

The spelling of 82485509 in words is "eighty-two million, four hundred eighty-five thousand, five hundred nine".