82731249 has 12 divisors (see below), whose sum is σ = 121014400. Its totient is φ = 54455544.

The previous prime is 82731247. The next prime is 82731331. The reversal of 82731249 is 94213728.

It is not a de Polignac number, because 82731249 - 2¹ = 82731247 is a prime.

It is a super-2 number, since 2×82731249² = 13688919122200002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (82731241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57469 + ... + 58890.

Almost surely, 2^82731249 is an apocalyptic number.

It is an amenable number.

82731249 is a deficient number, since it is larger than the sum of its proper divisors (38283151).

82731249 is a wasteful number, since it uses less digits than its factorization.

82731249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116444 (or 116441 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 82731249 is about 9095.6719927667. The cubic root of 82731249 is about 435.7357505045.

The spelling of 82731249 in words is "eighty-two million, seven hundred thirty-one thousand, two hundred forty-nine".