80730005 has 4 divisors (see below), whose sum is σ = 96876012. Its totient is φ = 64584000.

The previous prime is 80729959. The next prime is 80730011. The reversal of 80730005 is 50003708.

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 48762289 + 31967716 = 6983^2 + 5654^2 .

It is not a de Polignac number, because 80730005 - 2⁶ = 80729941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8072996 + ... + 8073005.

It is an arithmetic number, because the mean of its divisors is an integer number (24219003).

Almost surely, 2^80730005 is an apocalyptic number.

It is an amenable number.

80730005 is a deficient number, since it is larger than the sum of its proper divisors (16146007).

80730005 is a wasteful number, since it uses less digits than its factorization.

80730005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16146006.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 80730005 is about 8984.9877573651. The cubic root of 80730005 is about 432.1935950002.

The spelling of 80730005 in words is "eighty million, seven hundred thirty thousand, five".