80342009 has 4 divisors (see below), whose sum is σ = 87645840. Its totient is φ = 73038180.

The previous prime is 80341981. The next prime is 80342021. The reversal of 80342009 is 90024308.

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 80342009 - 2²⁰ = 79293433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80342039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3651899 + ... + 3651920.

It is an arithmetic number, because the mean of its divisors is an integer number (21911460).

Almost surely, 2^80342009 is an apocalyptic number.

It is an amenable number.

80342009 is a deficient number, since it is larger than the sum of its proper divisors (7303831).

80342009 is a wasteful number, since it uses less digits than its factorization.

80342009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7303830.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 80342009 is about 8963.3704040389. The cubic root of 80342009 is about 431.5000951078.

The spelling of 80342009 in words is "eighty million, three hundred forty-two thousand, nine".