100223809 has 4 divisors (see below), whose sum is σ = 114541504. Its totient is φ = 85906116.

The previous prime is 100223801. The next prime is 100223819. The reversal of 100223809 is 908322001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100223809 - 2³ = 100223801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100223801) 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, 7158837 + ... + 7158850.

It is an arithmetic number, because the mean of its divisors is an integer number (28635376).

Almost surely, 2^100223809 is an apocalyptic number.

It is an amenable number.

100223809 is a deficient number, since it is larger than the sum of its proper divisors (14317695).

100223809 is an equidigital number, since it uses as much as digits as its factorization.

100223809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14317694.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 100223809 is about 10011.1841956883. The cubic root of 100223809 is about 464.5049018011.

It can be divided in two parts, 10022 and 3809, that added together give a palindrome (13831).

The spelling of 100223809 in words is "one hundred million, two hundred twenty-three thousand, eight hundred nine".