80905009 has 8 divisors (see below), whose sum is σ = 83982080. Its totient is φ = 77857200.

The previous prime is 80905003. The next prime is 80905037. The reversal of 80905009 is 90050908.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80905009 - 2²⁵ = 47350577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80905003) 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 7 ways as a sum of consecutive naturals, for example, 1599 + ... + 12820.

It is an arithmetic number, because the mean of its divisors is an integer number (10497760).

Almost surely, 2^80905009 is an apocalyptic number.

It is an amenable number.

80905009 is a deficient number, since it is larger than the sum of its proper divisors (3077071).

80905009 is a wasteful number, since it uses less digits than its factorization.

80905009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14631.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 80905009 is about 8994.7211741110. The cubic root of 80905009 is about 432.5056682296.

The spelling of 80905009 in words is "eighty million, nine hundred five thousand, nine".