82109386 has 4 divisors (see below), whose sum is σ = 123164082. Its totient is φ = 41054692.

The previous prime is 82109381. The next prime is 82109387. The reversal of 82109386 is 68390128.

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., 65044225 + 17065161 = 8065^2 + 4131^2 .

It is not an unprimeable number, because it can be changed into a prime (82109381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20527345 + ... + 20527348.

Almost surely, 2^82109386 is an apocalyptic number.

82109386 is a deficient number, since it is larger than the sum of its proper divisors (41054696).

82109386 is a wasteful number, since it uses less digits than its factorization.

82109386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41054695.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 82109386 is about 9061.4229566884. The cubic root of 82109386 is about 434.6412438188.

The spelling of 82109386 in words is "eighty-two million, one hundred nine thousand, three hundred eighty-six".