108748721 has 2 divisors, whose sum is σ = 108748722. Its totient is φ = 108748720.

The previous prime is 108748697. The next prime is 108748729. The reversal of 108748721 is 127847801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62236321 + 46512400 = 7889^2 + 6820^2 .

It is an emirp because it is prime and its reverse (127847801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 108748721 - 2⁶ = 108748657 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (108748729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54374360 + 54374361.

It is an arithmetic number, because the mean of its divisors is an integer number (54374361).

Almost surely, 2^108748721 is an apocalyptic number.

It is an amenable number.

108748721 is a deficient number, since it is larger than the sum of its proper divisors (1).

108748721 is an equidigital number, since it uses as much as digits as its factorization.

108748721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 108748721 is about 10428.2654837705. The cubic root of 108748721 is about 477.3182642194.

The spelling of 108748721 in words is "one hundred eight million, seven hundred forty-eight thousand, seven hundred twenty-one".