105989489 has 2 divisors, whose sum is σ = 105989490. Its totient is φ = 105989488.

The previous prime is 105989483. The next prime is 105989531. The reversal of 105989489 is 984989501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105165025 + 824464 = 10255^2 + 908^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105989489 is a prime.

It is a super-2 number, since 2×105989489² = 22467543556962242, which contains 22 as substring.

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 105989489.

It is not a weakly prime, because it can be changed into another prime (105989483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52994744 + 52994745.

It is an arithmetic number, because the mean of its divisors is an integer number (52994745).

Almost surely, 2^105989489 is an apocalyptic number.

It is an amenable number.

105989489 is a deficient number, since it is larger than the sum of its proper divisors (1).

105989489 is an equidigital number, since it uses as much as digits as its factorization.

105989489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 105989489 is about 10295.1196690471. The cubic root of 105989489 is about 473.2467056415.

The spelling of 105989489 in words is "one hundred five million, nine hundred eighty-nine thousand, four hundred eighty-nine".