80290909 has 4 divisors (see below), whose sum is σ = 80518716. Its totient is φ = 80063104.

The previous prime is 80290901. The next prime is 80290957. The reversal of 80290909 is 90909208.

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 45185284 + 35105625 = 6722^2 + 5925^2 .

It is a cyclic number.

It is not a de Polignac number, because 80290909 - 2³ = 80290901 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 (80290901) 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, 113374 + ... + 114079.

It is an arithmetic number, because the mean of its divisors is an integer number (20129679).

Almost surely, 2^80290909 is an apocalyptic number.

It is an amenable number.

80290909 is a deficient number, since it is larger than the sum of its proper divisors (227807).

80290909 is a wasteful number, since it uses less digits than its factorization.

80290909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227806.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 80290909 is about 8960.5194603884. The cubic root of 80290909 is about 431.4085932416.

The spelling of 80290909 in words is "eighty million, two hundred ninety thousand, nine hundred nine".