10809961 has 2 divisors, whose sum is σ = 10809962. Its totient is φ = 10809960.

The previous prime is 10809959. The next prime is 10810001. The reversal of 10809961 is 16990801.

10809961 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7123561 + 3686400 = 2669^2 + 1920^2 .

It is an emirp because it is prime and its reverse (16990801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10809961 - 2¹ = 10809959 is a prime.

Together with 10809959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10809941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5404980 + 5404981.

It is an arithmetic number, because the mean of its divisors is an integer number (5404981).

Almost surely, 2^10809961 is an apocalyptic number.

It is an amenable number.

10809961 is a deficient number, since it is larger than the sum of its proper divisors (1).

10809961 is an equidigital number, since it uses as much as digits as its factorization.

10809961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 10809961 is about 3287.8505136335. The cubic root of 10809961 is about 221.1098257732.

The spelling of 10809961 in words is "ten million, eight hundred nine thousand, nine hundred sixty-one".