80426309 has 4 divisors (see below), whose sum is σ = 83199660. Its totient is φ = 77652960.

The previous prime is 80426293. The next prime is 80426323. The reversal of 80426309 is 90362408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65044225 + 15382084 = 8065^2 + 3922^2 .

It is a cyclic number.

It is not a de Polignac number, because 80426309 - 2⁴ = 80426293 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80426389) 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 in 3 ways as a sum of consecutive naturals, for example, 1386632 + ... + 1386689.

It is an arithmetic number, because the mean of its divisors is an integer number (20799915).

Almost surely, 2^80426309 is an apocalyptic number.

It is an amenable number.

80426309 is a deficient number, since it is larger than the sum of its proper divisors (2773351).

80426309 is a wasteful number, since it uses less digits than its factorization.

80426309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773350.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 80426309 is about 8968.0716433356. The cubic root of 80426309 is about 431.6509615656.

The spelling of 80426309 in words is "eighty million, four hundred twenty-six thousand, three hundred nine".