10891081 has 2 divisors, whose sum is σ = 10891082. Its totient is φ = 10891080.

The previous prime is 10891079. The next prime is 10891087. The reversal of 10891081 is 18019801.

10891081 is digitally balanced in base 2, because in such base 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., 10791225 + 99856 = 3285^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 10891081 - 2¹ = 10891079 is a prime.

It is a super-2 number, since 2×10891081² = 237231290697122, which contains 22 as substring.

Together with 10891079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10891087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5445540 + 5445541.

It is an arithmetic number, because the mean of its divisors is an integer number (5445541).

Almost surely, 2^10891081 is an apocalyptic number.

It is an amenable number.

10891081 is a deficient number, since it is larger than the sum of its proper divisors (1).

10891081 is an equidigital number, since it uses as much as digits as its factorization.

10891081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 28.

The square root of 10891081 is about 3300.1637838144. The cubic root of 10891081 is about 221.6615314041.

The spelling of 10891081 in words is "ten million, eight hundred ninety-one thousand, eighty-one".