82173307 has 4 divisors (see below), whose sum is σ = 84177576. Its totient is φ = 80169040.

The previous prime is 82173241. The next prime is 82173361. The reversal of 82173307 is 70337128.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82173307 - 2¹⁹ = 81649019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82173367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002073 + ... + 1002154.

It is an arithmetic number, because the mean of its divisors is an integer number (21044394).

Almost surely, 2^82173307 is an apocalyptic number.

82173307 is a deficient number, since it is larger than the sum of its proper divisors (2004269).

82173307 is a wasteful number, since it uses less digits than its factorization.

82173307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004268.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 82173307 is about 9064.9493655508. The cubic root of 82173307 is about 434.7540019249.

The spelling of 82173307 in words is "eighty-two million, one hundred seventy-three thousand, three hundred seven".