80626309 has 4 divisors (see below), whose sum is σ = 80961100. Its totient is φ = 80291520.

The previous prime is 80626289. The next prime is 80626321. The reversal of 80626309 is 90362608.

It is a happy number.

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 41563809 + 39062500 = 6447^2 + 6250^2 .

It is a cyclic number.

It is not a de Polignac number, because 80626309 - 2⁵ = 80626277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80626349) 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, 167034 + ... + 167515.

It is an arithmetic number, because the mean of its divisors is an integer number (20240275).

Almost surely, 2^80626309 is an apocalyptic number.

It is an amenable number.

80626309 is a deficient number, since it is larger than the sum of its proper divisors (334791).

80626309 is a wasteful number, since it uses less digits than its factorization.

80626309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334790.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 80626309 is about 8979.2153888856. The cubic root of 80626309 is about 432.0084678410.

The spelling of 80626309 in words is "eighty million, six hundred twenty-six thousand, three hundred nine".