80784161 has 4 divisors (see below), whose sum is σ = 80893632. Its totient is φ = 80674692.

The previous prime is 80784139. The next prime is 80784199. The reversal of 80784161 is 16148708.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80784161 - 2⁶ = 80784097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80784661) 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 3 ways as a sum of consecutive naturals, for example, 53621 + ... + 55106.

It is an arithmetic number, because the mean of its divisors is an integer number (20223408).

Almost surely, 2^80784161 is an apocalyptic number.

It is an amenable number.

80784161 is a deficient number, since it is larger than the sum of its proper divisors (109471).

80784161 is a wasteful number, since it uses less digits than its factorization.

80784161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109470.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 80784161 is about 8988.0009457053. Note that the first 3 decimals coincide. The cubic root of 80784161 is about 432.2902160128.

The spelling of 80784161 in words is "eighty million, seven hundred eighty-four thousand, one hundred sixty-one".