82009379 has 4 divisors (see below), whose sum is σ = 82085640. Its totient is φ = 81933120.

The previous prime is 82009373. The next prime is 82009381. The reversal of 82009379 is 97390028.

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 82009379 - 2⁴ = 82009363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82009373) 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, 36494 + ... + 38675.

It is an arithmetic number, because the mean of its divisors is an integer number (20521410).

Almost surely, 2^82009379 is an apocalyptic number.

82009379 is a deficient number, since it is larger than the sum of its proper divisors (76261).

82009379 is a wasteful number, since it uses less digits than its factorization.

82009379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76260.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 82009379 is about 9055.9029919716. The cubic root of 82009379 is about 434.4647117226.

The spelling of 82009379 in words is "eighty-two million, nine thousand, three hundred seventy-nine".