108921401 has 2 divisors, whose sum is σ = 108921402. Its totient is φ = 108921400.

The previous prime is 108921389. The next prime is 108921409. The reversal of 108921401 is 104129801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81631225 + 27290176 = 9035^2 + 5224^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108921401 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (108921409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54460700 + 54460701.

It is an arithmetic number, because the mean of its divisors is an integer number (54460701).

Almost surely, 2^108921401 is an apocalyptic number.

It is an amenable number.

108921401 is a deficient number, since it is larger than the sum of its proper divisors (1).

108921401 is an equidigital number, since it uses as much as digits as its factorization.

108921401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 108921401 is about 10436.5416206711. The cubic root of 108921401 is about 477.5707721092.

The spelling of 108921401 in words is "one hundred eight million, nine hundred twenty-one thousand, four hundred one".