82173247 has 8 divisors (see below), whose sum is σ = 89307680. Its totient is φ = 75155040.

The previous prime is 82173241. The next prime is 82173361. The reversal of 82173247 is 74237128.

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

It is a cyclic number.

It is not a de Polignac number, because 82173247 - 2¹⁵ = 82140479 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 (82173241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27579 + ... + 30412.

It is an arithmetic number, because the mean of its divisors is an integer number (11163460).

Almost surely, 2^82173247 is an apocalyptic number.

82173247 is a deficient number, since it is larger than the sum of its proper divisors (7134433).

82173247 is a wasteful number, since it uses less digits than its factorization.

82173247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58113.

The product of its digits is 18816, while the sum is 34.

The square root of 82173247 is about 9064.9460560998. The cubic root of 82173247 is about 434.7538961110.

The spelling of 82173247 in words is "eighty-two million, one hundred seventy-three thousand, two hundred forty-seven".