80861219 has 2 divisors, whose sum is σ = 80861220. Its totient is φ = 80861218.

The previous prime is 80861213. The next prime is 80861227. The reversal of 80861219 is 91216808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80861219 - 2¹⁶ = 80795683 is a prime.

It is a super-2 number, since 2×80861219² = 13077073476331922, which contains 22 as substring.

It is a Sophie Germain prime.

It is equal to p_4716773 and since 80861219 and 4716773 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (80861213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40430609 + 40430610.

It is an arithmetic number, because the mean of its divisors is an integer number (40430610).

Almost surely, 2^80861219 is an apocalyptic number.

80861219 is a deficient number, since it is larger than the sum of its proper divisors (1).

80861219 is an equidigital number, since it uses as much as digits as its factorization.

80861219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 80861219 is about 8992.2866391147. The cubic root of 80861219 is about 432.4276226241.

The spelling of 80861219 in words is "eighty million, eight hundred sixty-one thousand, two hundred nineteen".