106065991 has 2 divisors, whose sum is σ = 106065992. Its totient is φ = 106065990.

The previous prime is 106065989. The next prime is 106066019. The reversal of 106065991 is 199560601.

It is a weak prime.

It is an emirp because it is prime and its reverse (199560601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106065991 - 2¹ = 106065989 is a prime.

It is a super-2 number, since 2×106065991² = 22499988893624162, which contains 22 as substring.

Together with 106065989, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 106065991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106065901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53032995 + 53032996.

It is an arithmetic number, because the mean of its divisors is an integer number (53032996).

Almost surely, 2^106065991 is an apocalyptic number.

106065991 is a deficient number, since it is larger than the sum of its proper divisors (1).

106065991 is an equidigital number, since it uses as much as digits as its factorization.

106065991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 106065991 is about 10298.8344486160. The cubic root of 106065991 is about 473.3605396097.

The spelling of 106065991 in words is "one hundred six million, sixty-five thousand, nine hundred ninety-one".