108740239921 has 2 divisors, whose sum is σ = 108740239922. Its totient is φ = 108740239920.

The previous prime is 108740239913. The next prime is 108740239967. The reversal of 108740239921 is 129932047801.

It is a happy number.

It is an a-pointer prime, because the next prime (108740239967) can be obtained adding 108740239921 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104138517025 + 4601722896 = 322705^2 + 67836^2 .

It is a cyclic number.

It is not a de Polignac number, because 108740239921 - 2³ = 108740239913 is a prime.

It is not a weakly prime, because it can be changed into another prime (108740239721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54370119960 + 54370119961.

It is an arithmetic number, because the mean of its divisors is an integer number (54370119961).

Almost surely, 2^108740239921 is an apocalyptic number.

It is an amenable number.

108740239921 is a deficient number, since it is larger than the sum of its proper divisors (1).

108740239921 is an equidigital number, since it uses as much as digits as its factorization.

108740239921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 108740239921 in words is "one hundred eight billion, seven hundred forty million, two hundred thirty-nine thousand, nine hundred twenty-one".