82173745 has 4 divisors (see below), whose sum is σ = 98608500. Its totient is φ = 65738992.

The previous prime is 82173677. The next prime is 82173757. The reversal of 82173745 is 54737128.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8625969 + 73547776 = 2937^2 + 8576^2 .

It is a cyclic number.

It is not a de Polignac number, because 82173745 - 2¹⁷ = 82042673 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8217370 + ... + 8217379.

It is an arithmetic number, because the mean of its divisors is an integer number (24652125).

Almost surely, 2^82173745 is an apocalyptic number.

It is an amenable number.

82173745 is a deficient number, since it is larger than the sum of its proper divisors (16434755).

82173745 is a wasteful number, since it uses less digits than its factorization.

82173745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16434754.

The product of its digits is 47040, while the sum is 37.

The square root of 82173745 is about 9064.9735245063. The cubic root of 82173745 is about 434.7547743652.

The spelling of 82173745 in words is "eighty-two million, one hundred seventy-three thousand, seven hundred forty-five".