82791245 has 4 divisors (see below), whose sum is σ = 99349500. Its totient is φ = 66232992.

The previous prime is 82791217. The next prime is 82791251. The reversal of 82791245 is 54219728.

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 40424164 + 42367081 = 6358^2 + 6509^2 .

It is a cyclic number.

It is not a de Polignac number, because 82791245 - 2⁸ = 82790989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82791199 and 82791208.

It is a congruent number.

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, 8279120 + ... + 8279129.

It is an arithmetic number, because the mean of its divisors is an integer number (24837375).

Almost surely, 2^82791245 is an apocalyptic number.

It is an amenable number.

82791245 is a deficient number, since it is larger than the sum of its proper divisors (16558255).

82791245 is a wasteful number, since it uses less digits than its factorization.

82791245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16558254.

The product of its digits is 40320, while the sum is 38.

The square root of 82791245 is about 9098.9694471407. The cubic root of 82791245 is about 435.8410556765.

The spelling of 82791245 in words is "eighty-two million, seven hundred ninety-one thousand, two hundred forty-five".