109000921 has 2 divisors, whose sum is σ = 109000922. Its totient is φ = 109000920.

The previous prime is 109000909. The next prime is 109000987. The reversal of 109000921 is 129000901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 34351321 = 8640^2 + 5861^2 .

It is an emirp because it is prime and its reverse (129000901) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109000921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 109000892 and 109000901.

It is not a weakly prime, because it can be changed into another prime (109000901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54500460 + 54500461.

It is an arithmetic number, because the mean of its divisors is an integer number (54500461).

Almost surely, 2^109000921 is an apocalyptic number.

It is an amenable number.

109000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

109000921 is an equidigital number, since it uses as much as digits as its factorization.

109000921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 109000921 is about 10440.3506167178. The cubic root of 109000921 is about 477.6869635078.

The spelling of 109000921 in words is "one hundred nine million, nine hundred twenty-one", and thus it is an aban number.