80387609 has 4 divisors (see below), whose sum is σ = 81125220. Its totient is φ = 79650000.

The previous prime is 80387603. The next prime is 80387641. The reversal of 80387609 is 90678308.

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 57078025 + 23309584 = 7555^2 + 4828^2 .

It is a cyclic number.

It is not a de Polignac number, because 80387609 - 2²⁰ = 79339033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80387603) 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, 368642 + ... + 368859.

It is an arithmetic number, because the mean of its divisors is an integer number (20281305).

Almost surely, 2^80387609 is an apocalyptic number.

It is an amenable number.

80387609 is a deficient number, since it is larger than the sum of its proper divisors (737611).

80387609 is a wasteful number, since it uses less digits than its factorization.

80387609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737610.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 80387609 is about 8965.9137292303. The cubic root of 80387609 is about 431.5817156827.

The spelling of 80387609 in words is "eighty million, three hundred eighty-seven thousand, six hundred nine".