82724249 has 4 divisors (see below), whose sum is σ = 83456436. Its totient is φ = 81992064.

The previous prime is 82724221. The next prime is 82724263. The reversal of 82724249 is 94242728.

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 7590025 + 75134224 = 2755^2 + 8668^2 .

It is a cyclic number.

It is not a de Polignac number, because 82724249 - 2¹² = 82720153 is a prime.

It is a super-2 number, since 2×82724249² = 13686602745228002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82124249) 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, 365924 + ... + 366149.

It is an arithmetic number, because the mean of its divisors is an integer number (20864109).

Almost surely, 2^82724249 is an apocalyptic number.

It is an amenable number.

82724249 is a deficient number, since it is larger than the sum of its proper divisors (732187).

82724249 is a wasteful number, since it uses less digits than its factorization.

82724249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732186.

The product of its digits is 64512, while the sum is 38.

The square root of 82724249 is about 9095.2871862300. The cubic root of 82724249 is about 435.7234607658.

It can be divided in two parts, 8272 and 4249, that added together give a palindrome (12521).

The spelling of 82724249 in words is "eighty-two million, seven hundred twenty-four thousand, two hundred forty-nine".