80727685 has 4 divisors (see below), whose sum is σ = 96873228. Its totient is φ = 64582144.

The previous prime is 80727671. The next prime is 80727701. The reversal of 80727685 is 58672708.

It is a happy number.

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 26071236 + 54656449 = 5106^2 + 7393^2 .

It is a cyclic number.

It is not a de Polignac number, because 80727685 - 2⁷ = 80727557 is a prime.

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, 8072764 + ... + 8072773.

It is an arithmetic number, because the mean of its divisors is an integer number (24218307).

Almost surely, 2^80727685 is an apocalyptic number.

It is an amenable number.

80727685 is a deficient number, since it is larger than the sum of its proper divisors (16145543).

80727685 is a wasteful number, since it uses less digits than its factorization.

80727685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16145542.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 80727685 is about 8984.8586521993. The cubic root of 80727685 is about 432.1894548677.

The spelling of 80727685 in words is "eighty million, seven hundred twenty-seven thousand, six hundred eighty-five".