80356309 has 16 divisors (see below), whose sum is σ = 91791360. Its totient is φ = 69678000.

The previous prime is 80356279. The next prime is 80356327. The reversal of 80356309 is 90365308.

It is a cyclic number.

It is not a de Polignac number, because 80356309 - 2⁵ = 80356277 is a prime.

It is a super-2 number, since 2×80356309² = 12914272792206962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80356349) 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 15 ways as a sum of consecutive naturals, for example, 22552 + ... + 25870.

It is an arithmetic number, because the mean of its divisors is an integer number (5736960).

Almost surely, 2^80356309 is an apocalyptic number.

It is an amenable number.

80356309 is a deficient number, since it is larger than the sum of its proper divisors (11435051).

80356309 is a wasteful number, since it uses less digits than its factorization.

80356309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 80356309 is about 8964.1680595580. The cubic root of 80356309 is about 431.5256943569.

The spelling of 80356309 in words is "eighty million, three hundred fifty-six thousand, three hundred nine".