108938891 has 2 divisors, whose sum is σ = 108938892. Its totient is φ = 108938890.

The previous prime is 108938831. The next prime is 108938939. The reversal of 108938891 is 198839801.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (198839801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108938891 - 2⁶ = 108938827 is a prime.

It is not a weakly prime, because it can be changed into another prime (108938821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54469445 + 54469446.

It is an arithmetic number, because the mean of its divisors is an integer number (54469446).

Almost surely, 2^108938891 is an apocalyptic number.

108938891 is a deficient number, since it is larger than the sum of its proper divisors (1).

108938891 is an equidigital number, since it uses as much as digits as its factorization.

108938891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 108938891 is about 10437.3795082866. The cubic root of 108938891 is about 477.5963326379.

The spelling of 108938891 in words is "one hundred eight million, nine hundred thirty-eight thousand, eight hundred ninety-one".