80212609 has 2 divisors, whose sum is σ = 80212610. Its totient is φ = 80212608.

The previous prime is 80212567. The next prime is 80212651. The reversal of 80212609 is 90621208.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (80212567) and next prime (80212651).

It can be written as a sum of positive squares in only one way, i.e., 69355584 + 10857025 = 8328^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 80212609 - 2²³ = 71824001 is a prime.

It is equal to p_4681018 and since 80212609 and 4681018 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 (80212669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40106304 + 40106305.

It is an arithmetic number, because the mean of its divisors is an integer number (40106305).

Almost surely, 2^80212609 is an apocalyptic number.

It is an amenable number.

80212609 is a deficient number, since it is larger than the sum of its proper divisors (1).

80212609 is an equidigital number, since it uses as much as digits as its factorization.

80212609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 80212609 is about 8956.1492283235. The cubic root of 80212609 is about 431.2683105297.

The spelling of 80212609 in words is "eighty million, two hundred twelve thousand, six hundred nine".