82108919 has 4 divisors (see below), whose sum is σ = 85678896. Its totient is φ = 78538944.

The previous prime is 82108913. The next prime is 82108921. The reversal of 82108919 is 91980128.

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 82108919 - 2⁴ = 82108903 is a prime.

It is a super-2 number, since 2×82108919² = 13483749158697122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82108913) 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, 1784954 + ... + 1784999.

It is an arithmetic number, because the mean of its divisors is an integer number (21419724).

Almost surely, 2^82108919 is an apocalyptic number.

82108919 is a deficient number, since it is larger than the sum of its proper divisors (3569977).

82108919 is a wasteful number, since it uses less digits than its factorization.

82108919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569976.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 82108919 is about 9061.3971880720. The cubic root of 82108919 is about 434.6404198048.

The spelling of 82108919 in words is "eighty-two million, one hundred eight thousand, nine hundred nineteen".