105649489 has 8 divisors (see below), whose sum is σ = 115420032. Its totient is φ = 95906640.

The previous prime is 105649483. The next prime is 105649513. The reversal of 105649489 is 984946501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 105649489 - 2⁷ = 105649361 is a prime.

It is a super-2 number, since 2×105649489² = 22323629051922242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105649483) 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 in 7 ways as a sum of consecutive naturals, for example, 1512 + ... + 14614.

It is an arithmetic number, because the mean of its divisors is an integer number (14427504).

Almost surely, 2^105649489 is an apocalyptic number.

It is an amenable number.

105649489 is a deficient number, since it is larger than the sum of its proper divisors (9770543).

105649489 is a wasteful number, since it uses less digits than its factorization.

105649489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13847.

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

The square root of 105649489 is about 10278.5937267702. The cubic root of 105649489 is about 472.7401263528.

The spelling of 105649489 in words is "one hundred five million, six hundred forty-nine thousand, four hundred eighty-nine".