82712387 has 4 divisors (see below), whose sum is σ = 82881336. Its totient is φ = 82543440.

The previous prime is 82712341. The next prime is 82712407. The reversal of 82712387 is 78321728.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82712387 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82712387.

It is not an unprimeable number, because it can be changed into a prime (82712317) 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, 83738 + ... + 84719.

It is an arithmetic number, because the mean of its divisors is an integer number (20720334).

Almost surely, 2^82712387 is an apocalyptic number.

82712387 is a deficient number, since it is larger than the sum of its proper divisors (168949).

82712387 is a wasteful number, since it uses less digits than its factorization.

82712387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168948.

The product of its digits is 37632, while the sum is 38.

The square root of 82712387 is about 9094.6350668952. The cubic root of 82712387 is about 435.7026333429.

The spelling of 82712387 in words is "eighty-two million, seven hundred twelve thousand, three hundred eighty-seven".