82704005 has 4 divisors (see below), whose sum is σ = 99244812. Its totient is φ = 66163200.

The previous prime is 82703993. The next prime is 82704019. The reversal of 82704005 is 50040728.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21520321 + 61183684 = 4639^2 + 7822^2 .

It is not a de Polignac number, because 82704005 - 2¹⁴ = 82687621 is a prime.

It is a super-3 number, since 3×82704005³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8270396 + ... + 8270405.

It is an arithmetic number, because the mean of its divisors is an integer number (24811203).

Almost surely, 2^82704005 is an apocalyptic number.

It is an amenable number.

82704005 is a deficient number, since it is larger than the sum of its proper divisors (16540807).

82704005 is a wasteful number, since it uses less digits than its factorization.

82704005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16540806.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 82704005 is about 9094.1742340907. The cubic root of 82704005 is about 435.6879149395.

The spelling of 82704005 in words is "eighty-two million, seven hundred four thousand, five".