82501709 has 4 divisors (see below), whose sum is σ = 82690080. Its totient is φ = 82313340.

The previous prime is 82501691. The next prime is 82501711. The reversal of 82501709 is 90710528.

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 a de Polignac number, because none of the positive numbers 2^k-82501709 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 (82501729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93527 + ... + 94404.

It is an arithmetic number, because the mean of its divisors is an integer number (20672520).

Almost surely, 2^82501709 is an apocalyptic number.

It is an amenable number.

82501709 is a deficient number, since it is larger than the sum of its proper divisors (188371).

82501709 is a wasteful number, since it uses less digits than its factorization.

82501709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188370.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 82501709 is about 9083.0451391590. The cubic root of 82501709 is about 435.3323905093.

The spelling of 82501709 in words is "eighty-two million, five hundred one thousand, seven hundred nine".