90243234209 has 8 divisors (see below), whose sum is σ = 90363276000. Its totient is φ = 90123275200.

The previous prime is 90243234199. The next prime is 90243234223.

90243234209 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 a de Polignac number, because none of the positive numbers 2^k-90243234209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90243234229) 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 7 ways as a sum of consecutive naturals, for example, 2335769 + ... + 2374089.

It is an arithmetic number, because the mean of its divisors is an integer number (11295409500).

Almost surely, 2^90243234209 is an apocalyptic number.

It is an amenable number.

90243234209 is a deficient number, since it is larger than the sum of its proper divisors (120041791).

90243234209 is a wasteful number, since it uses less digits than its factorization.

90243234209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41391.

The product of its (nonzero) digits is 93312, while the sum is 38.

The spelling of 90243234209 in words is "ninety billion, two hundred forty-three million, two hundred thirty-four thousand, two hundred nine".