106565491 has 2 divisors, whose sum is σ = 106565492. Its totient is φ = 106565490.

The previous prime is 106565489. The next prime is 106565531. The reversal of 106565491 is 194565601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 106565491 - 2¹ = 106565489 is a prime.

It is a super-2 number, since 2×106565491² = 22712407744142162, which contains 22 as substring.

Together with 106565489, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 106565491.

It is not a weakly prime, because it can be changed into another prime (106565891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53282745 + 53282746.

It is an arithmetic number, because the mean of its divisors is an integer number (53282746).

Almost surely, 2^106565491 is an apocalyptic number.

106565491 is a deficient number, since it is larger than the sum of its proper divisors (1).

106565491 is an equidigital number, since it uses as much as digits as its factorization.

106565491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 106565491 is about 10323.0562819351. The cubic root of 106565491 is about 474.1024468932.

The spelling of 106565491 in words is "one hundred six million, five hundred sixty-five thousand, four hundred ninety-one".