82105699 has 32 divisors (see below), whose sum is σ = 101243520. Its totient is φ = 65759232.

The previous prime is 82105693. The next prime is 82105703. The reversal of 82105699 is 99650128.

It is a cyclic number.

It is not a de Polignac number, because 82105699 - 2⁷ = 82105571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82105693) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147129 + ... + 147685.

It is an arithmetic number, because the mean of its divisors is an integer number (3163860).

Almost surely, 2^82105699 is an apocalyptic number.

82105699 is a deficient number, since it is larger than the sum of its proper divisors (19137821).

82105699 is a wasteful number, since it uses less digits than its factorization.

82105699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 82105699 is about 9061.2195095362. The cubic root of 82105699 is about 434.6347380817.

The spelling of 82105699 in words is "eighty-two million, one hundred five thousand, six hundred ninety-nine".