80712779 has 8 divisors (see below), whose sum is σ = 97098240. Its totient is φ = 65541096.

The previous prime is 80712761. The next prime is 80712781. The reversal of 80712779 is 97721708.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80712779 - 2¹⁶ = 80647243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80712179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303299 + ... + 303564.

It is an arithmetic number, because the mean of its divisors is an integer number (12137280).

Almost surely, 2^80712779 is an apocalyptic number.

80712779 is a deficient number, since it is larger than the sum of its proper divisors (16385461).

80712779 is a wasteful number, since it uses less digits than its factorization.

80712779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606889.

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 80712779 is about 8984.0291072547. The cubic root of 80712779 is about 432.1628526243.

The spelling of 80712779 in words is "eighty million, seven hundred twelve thousand, seven hundred seventy-nine".