82687679 has 4 divisors (see below), whose sum is σ = 83490576. Its totient is φ = 81884784.

The previous prime is 82687673. The next prime is 82687681. The reversal of 82687679 is 97678628.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 82687679 - 2¹² = 82683583 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 82687679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82687673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401294 + ... + 401499.

It is an arithmetic number, because the mean of its divisors is an integer number (20872644).

Almost surely, 2^82687679 is an apocalyptic number.

82687679 is a deficient number, since it is larger than the sum of its proper divisors (802897).

82687679 is a wasteful number, since it uses less digits than its factorization.

82687679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802896.

The product of its digits is 2032128, while the sum is 53.

The square root of 82687679 is about 9093.2765821787. The cubic root of 82687679 is about 435.6592443852.

The spelling of 82687679 in words is "eighty-two million, six hundred eighty-seven thousand, six hundred seventy-nine".