108321091 has 4 divisors (see below), whose sum is σ = 108369592. Its totient is φ = 108272592.

The previous prime is 108321077. The next prime is 108321097. The reversal of 108321091 is 190123801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108321091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108321097) 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, 20730 + ... + 25423.

It is an arithmetic number, because the mean of its divisors is an integer number (27092398).

Almost surely, 2^108321091 is an apocalyptic number.

108321091 is a deficient number, since it is larger than the sum of its proper divisors (48501).

108321091 is an equidigital number, since it uses as much as digits as its factorization.

108321091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48500.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 108321091 is about 10407.7418780444. The cubic root of 108321091 is about 476.6917932756.

Adding to 108321091 its reverse (190123801), we get a palindrome (298444892).

The spelling of 108321091 in words is "one hundred eight million, three hundred twenty-one thousand, ninety-one".