105449689 has 2 divisors, whose sum is σ = 105449690. Its totient is φ = 105449688.

The previous prime is 105449683. The next prime is 105449719. The reversal of 105449689 is 986944501.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61889689 + 43560000 = 7867^2 + 6600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105449689 is a prime.

It is a super-2 number, since 2×105449689² = 22239273820393442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105449683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52724844 + 52724845.

It is an arithmetic number, because the mean of its divisors is an integer number (52724845).

Almost surely, 2^105449689 is an apocalyptic number.

It is an amenable number.

105449689 is a deficient number, since it is larger than the sum of its proper divisors (1).

105449689 is an equidigital number, since it uses as much as digits as its factorization.

105449689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 105449689 is about 10268.8698988740. The cubic root of 105449689 is about 472.4419293526.

The spelling of 105449689 in words is "one hundred five million, four hundred forty-nine thousand, six hundred eighty-nine".