82173730 has 8 divisors (see below), whose sum is σ = 147912732. Its totient is φ = 32869488.

The previous prime is 82173677. The next prime is 82173757. The reversal of 82173730 is 3737128.

It can be written as a sum of positive squares in 2 ways, for example, as 75325041 + 6848689 = 8679^2 + 2617^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×82173730² = 13505043804225800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 82173692 and 82173701.

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, 4108677 + ... + 4108696.

Almost surely, 2^82173730 is an apocalyptic number.

82173730 is a deficient number, since it is larger than the sum of its proper divisors (65739002).

82173730 is a wasteful number, since it uses less digits than its factorization.

82173730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8217380.

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

The square root of 82173730 is about 9064.9726971459. The cubic root of 82173730 is about 434.7547479118.

The spelling of 82173730 in words is "eighty-two million, one hundred seventy-three thousand, seven hundred thirty".