80755009 has 4 divisors (see below), whose sum is σ = 81861316. Its totient is φ = 79648704.

The previous prime is 80755007. The next prime is 80755057. The reversal of 80755009 is 90055708.

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 58476609 + 22278400 = 7647^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 80755009 - 2¹ = 80755007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80755007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553044 + ... + 553189.

It is an arithmetic number, because the mean of its divisors is an integer number (20465329).

Almost surely, 2^80755009 is an apocalyptic number.

It is an amenable number.

80755009 is a deficient number, since it is larger than the sum of its proper divisors (1106307).

80755009 is a wasteful number, since it uses less digits than its factorization.

80755009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106306.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 80755009 is about 8986.3790816991. The cubic root of 80755009 is about 432.2382106015.

The spelling of 80755009 in words is "eighty million, seven hundred fifty-five thousand, nine".