80135509 has 4 divisors (see below), whose sum is σ = 80538400. Its totient is φ = 79732620.

The previous prime is 80135477. The next prime is 80135543. The reversal of 80135509 is 90553108.

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 80135509 - 2⁵ = 80135477 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 (80135579) 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, 201147 + ... + 201544.

It is an arithmetic number, because the mean of its divisors is an integer number (20134600).

Almost surely, 2^80135509 is an apocalyptic number.

It is an amenable number.

80135509 is a deficient number, since it is larger than the sum of its proper divisors (402891).

80135509 is a wasteful number, since it uses less digits than its factorization.

80135509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402890.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 80135509 is about 8951.8438882724. The cubic root of 80135509 is about 431.1300885122.

The spelling of 80135509 in words is "eighty million, one hundred thirty-five thousand, five hundred nine".