82659869 has 4 divisors (see below), whose sum is σ = 83462496. Its totient is φ = 81857244.

The previous prime is 82659859. The next prime is 82659893. The reversal of 82659869 is 96895628.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82659869 - 2¹² = 82655773 is a prime.

It is a super-2 number, since 2×82659869² = 13665307886194322, which contains 22 as substring.

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 82659869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82659859) 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, 401159 + ... + 401364.

It is an arithmetic number, because the mean of its divisors is an integer number (20865624).

Almost surely, 2^82659869 is an apocalyptic number.

It is an amenable number.

82659869 is a deficient number, since it is larger than the sum of its proper divisors (802627).

82659869 is a wasteful number, since it uses less digits than its factorization.

82659869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802626.

The product of its digits is 1866240, while the sum is 53.

The square root of 82659869 is about 9091.7473018117. The cubic root of 82659869 is about 435.6103977603.

The spelling of 82659869 in words is "eighty-two million, six hundred fifty-nine thousand, eight hundred sixty-nine".