80861217 has 8 divisors (see below), whose sum is σ = 109026720. Its totient is φ = 53301600.

The previous prime is 80861213. The next prime is 80861219. The reversal of 80861217 is 71216808.

It is a happy number.

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

It is not a de Polignac number, because 80861217 - 2² = 80861213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80861213) 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, 151159 + ... + 151692.

It is an arithmetic number, because the mean of its divisors is an integer number (13628340).

Almost surely, 2^80861217 is an apocalyptic number.

It is an amenable number.

80861217 is a deficient number, since it is larger than the sum of its proper divisors (28165503).

80861217 is a wasteful number, since it uses less digits than its factorization.

80861217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302943.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 80861217 is about 8992.2865279082. The cubic root of 80861217 is about 432.4276190589.

The spelling of 80861217 in words is "eighty million, eight hundred sixty-one thousand, two hundred seventeen".