80784769 has 8 divisors (see below), whose sum is σ = 87124520. Its totient is φ = 74462976.

The previous prime is 80784733. The next prime is 80784779. The reversal of 80784769 is 96748708.

It can be written as a sum of positive squares in 4 ways, for example, as 625 + 80784144 = 25^2 + 8988^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80784769 is a prime.

It is a super-2 number, since 2×80784769² = 13052357804766722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80784779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5737 + ... + 13945.

It is an arithmetic number, because the mean of its divisors is an integer number (10890565).

Almost surely, 2^80784769 is an apocalyptic number.

It is an amenable number.

80784769 is a deficient number, since it is larger than the sum of its proper divisors (6339751).

80784769 is a wasteful number, since it uses less digits than its factorization.

80784769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 80784769 is about 8988.0347685131. The cubic root of 80784769 is about 432.2913005150.

The spelling of 80784769 in words is "eighty million, seven hundred eighty-four thousand, seven hundred sixty-nine".