82161767 has 4 divisors (see below), whose sum is σ = 82182576. Its totient is φ = 82140960.

The previous prime is 82161763. The next prime is 82161791. The reversal of 82161767 is 76716128.

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 82161767 - 2² = 82161763 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 82161767.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82161763) 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, 2459 + ... + 13052.

It is an arithmetic number, because the mean of its divisors is an integer number (20545644).

Almost surely, 2^82161767 is an apocalyptic number.

82161767 is a deficient number, since it is larger than the sum of its proper divisors (20809).

82161767 is a wasteful number, since it uses less digits than its factorization.

82161767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20808.

The product of its digits is 28224, while the sum is 38.

The square root of 82161767 is about 9064.3128255814. The cubic root of 82161767 is about 434.7336494275.

It can be divided in two parts, 82161 and 767, that added together give a palindrome (82928).

The spelling of 82161767 in words is "eighty-two million, one hundred sixty-one thousand, seven hundred sixty-seven".