80365709 has 4 divisors (see below), whose sum is σ = 80488320. Its totient is φ = 80243100.

The previous prime is 80365697. The next prime is 80365717. The reversal of 80365709 is 90756308.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80365709 - 2⁴ = 80365693 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 (80365759) 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, 60317 + ... + 61634.

It is an arithmetic number, because the mean of its divisors is an integer number (20122080).

Almost surely, 2^80365709 is an apocalyptic number.

It is an amenable number.

80365709 is a deficient number, since it is larger than the sum of its proper divisors (122611).

80365709 is a wasteful number, since it uses less digits than its factorization.

80365709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122610.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 80365709 is about 8964.6923538959. The cubic root of 80365709 is about 431.5425201810.

The spelling of 80365709 in words is "eighty million, three hundred sixty-five thousand, seven hundred nine".