108209901 has 4 divisors (see below), whose sum is σ = 144279872. Its totient is φ = 72139932.

The previous prime is 108209897. The next prime is 108209903. The reversal of 108209901 is 109902801.

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: 109902801 = 3 ⋅36634267.

It is not a de Polignac number, because 108209901 - 2² = 108209897 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 (108209903) 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, 18034981 + ... + 18034986.

It is an arithmetic number, because the mean of its divisors is an integer number (36069968).

Almost surely, 2^108209901 is an apocalyptic number.

It is an amenable number.

108209901 is a deficient number, since it is larger than the sum of its proper divisors (36069971).

108209901 is an equidigital number, since it uses as much as digits as its factorization.

108209901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36069970.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 108209901 is about 10402.3988098900. The cubic root of 108209901 is about 476.5286317402.

The spelling of 108209901 in words is "one hundred eight million, two hundred nine thousand, nine hundred one".