82073509 has 16 divisors (see below), whose sum is σ = 98017920. Its totient is φ = 67233600.

The previous prime is 82073491. The next prime is 82073527. The reversal of 82073509 is 90537028.

It is an interprime number because it is at equal distance from previous prime (82073491) and next prime (82073527).

It is not a de Polignac number, because 82073509 - 2⁹ = 82072997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82073599) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18502 + ... + 22504.

It is an arithmetic number, because the mean of its divisors is an integer number (6126120).

Almost surely, 2^82073509 is an apocalyptic number.

It is an amenable number.

82073509 is a deficient number, since it is larger than the sum of its proper divisors (15944411).

82073509 is a wasteful number, since it uses less digits than its factorization.

82073509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4140.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 82073509 is about 9059.4430844285. The cubic root of 82073509 is about 434.5779303278.

The spelling of 82073509 in words is "eighty-two million, seventy-three thousand, five hundred nine".