90800809 has 8 divisors (see below), whose sum is σ = 99836928. Its totient is φ = 81894960.

The previous prime is 90800789. The next prime is 90800813.

90800809 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90800809 - 2¹³ = 90792617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90800869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31102 + ... + 33895.

It is an arithmetic number, because the mean of its divisors is an integer number (12479616).

Almost surely, 2^90800809 is an apocalyptic number.

It is an amenable number.

90800809 is a deficient number, since it is larger than the sum of its proper divisors (9036119).

90800809 is a wasteful number, since it uses less digits than its factorization.

90800809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65135.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 90800809 is about 9528.9458493582. The cubic root of 90800809 is about 449.4657181654.

The spelling of 90800809 in words is "ninety million, eight hundred thousand, eight hundred nine".