109368209 has 4 divisors (see below), whose sum is σ = 110229504. Its totient is φ = 108506916.

The previous prime is 109368173. The next prime is 109368229. The reversal of 109368209 is 902863901.

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, and also an emirpimes, since its reverse is a distinct semiprime: 902863901 = 383 ⋅2357347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109368209 is a prime.

It is a super-2 number, since 2×109368209² = 23922810279735362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109368229) 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, 430457 + ... + 430710.

It is an arithmetic number, because the mean of its divisors is an integer number (27557376).

Almost surely, 2^109368209 is an apocalyptic number.

It is an amenable number.

109368209 is a deficient number, since it is larger than the sum of its proper divisors (861295).

109368209 is an equidigital number, since it uses as much as digits as its factorization.

109368209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861294.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 109368209 is about 10457.9256547367. The cubic root of 109368209 is about 478.2228978001. Note that the first 3 decimals are identical.

The spelling of 109368209 in words is "one hundred nine million, three hundred sixty-eight thousand, two hundred nine".