82161194 has 4 divisors (see below), whose sum is σ = 123241794. Its totient is φ = 41080596.

The previous prime is 82161193. The next prime is 82161197. The reversal of 82161194 is 49116128.

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

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 30393169 = 7195^2 + 5513^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 82161194.

It is not an unprimeable number, because it can be changed into a prime (82161193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20540297 + ... + 20540300.

Almost surely, 2^82161194 is an apocalyptic number.

82161194 is a deficient number, since it is larger than the sum of its proper divisors (41080600).

82161194 is a wasteful number, since it uses less digits than its factorization.

82161194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41080599.

The product of its digits is 3456, while the sum is 32.

The square root of 82161194 is about 9064.2812180558. The cubic root of 82161194 is about 434.7326388076.

The spelling of 82161194 in words is "eighty-two million, one hundred sixty-one thousand, one hundred ninety-four".