80190509 has 6 divisors (see below), whose sum is σ = 93282894. Its totient is φ = 68734680.

The previous prime is 80190503. The next prime is 80190553. The reversal of 80190509 is 90509108.

It can be written as a sum of positive squares in only one way, i.e., 54434884 + 25755625 = 7378^2 + 5075^2 .

It is not a de Polignac number, because 80190509 - 2⁴ = 80190493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80190503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 818222 + ... + 818319.

It is an arithmetic number, because the mean of its divisors is an integer number (15547149).

Almost surely, 2^80190509 is an apocalyptic number.

It is an amenable number.

80190509 is a deficient number, since it is larger than the sum of its proper divisors (13092385).

80190509 is a wasteful number, since it uses less digits than its factorization.

80190509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636555 (or 1636548 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 80190509 is about 8954.9153541505. The cubic root of 80190509 is about 431.2286995290.

The spelling of 80190509 in words is "eighty million, one hundred ninety thousand, five hundred nine".