82787245 has 4 divisors (see below), whose sum is σ = 99344700. Its totient is φ = 66229792.

The previous prime is 82787233. The next prime is 82787249. The reversal of 82787245 is 54278728.

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 58155876 + 24631369 = 7626^2 + 4963^2 .

It is a cyclic number.

It is not a de Polignac number, because 82787245 - 2⁵ = 82787213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82787249) 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, 8278720 + ... + 8278729.

It is an arithmetic number, because the mean of its divisors is an integer number (24836175).

Almost surely, 2^82787245 is an apocalyptic number.

It is an amenable number.

82787245 is a deficient number, since it is larger than the sum of its proper divisors (16557455).

82787245 is a wasteful number, since it uses less digits than its factorization.

82787245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16557454.

The product of its digits is 250880, while the sum is 43.

The square root of 82787245 is about 9098.7496393735. The cubic root of 82787245 is about 435.8340364468.

The spelling of 82787245 in words is "eighty-two million, seven hundred eighty-seven thousand, two hundred forty-five".