80190909 has 6 divisors (see below), whose sum is σ = 115831326. Its totient is φ = 53460600.

The previous prime is 80190899. The next prime is 80190923. The reversal of 80190909 is 90909108.

It can be written as a sum of positive squares in only one way, i.e., 58568409 + 21622500 = 7653^2 + 4650^2 .

It is not a de Polignac number, because 80190909 - 2⁸ = 80190653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80190109) 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 5 ways as a sum of consecutive naturals, for example, 4455042 + ... + 4455059.

It is an arithmetic number, because the mean of its divisors is an integer number (19305221).

Almost surely, 2^80190909 is an apocalyptic number.

It is an amenable number.

80190909 is a deficient number, since it is larger than the sum of its proper divisors (35640417).

80190909 is a wasteful number, since it uses less digits than its factorization.

80190909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8910107 (or 8910104 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 80190909 is about 8954.9376882254. The cubic root of 80190909 is about 431.2294165349.

The spelling of 80190909 in words is "eighty million, one hundred ninety thousand, nine hundred nine".