105755989 has 4 divisors (see below), whose sum is σ = 106803180. Its totient is φ = 104708800.

The previous prime is 105755987. The next prime is 105756023. The reversal of 105755989 is 989557501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 989557501 = 607 ⋅1630243.

It can be written as a sum of positive squares in 2 ways, for example, as 95707089 + 10048900 = 9783^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 105755989 - 2¹ = 105755987 is a prime.

It is a super-2 number, since 2×105755989² = 22368658418736242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105755981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523444 + ... + 523645.

It is an arithmetic number, because the mean of its divisors is an integer number (26700795).

Almost surely, 2^105755989 is an apocalyptic number.

It is an amenable number.

105755989 is a deficient number, since it is larger than the sum of its proper divisors (1047191).

105755989 is a wasteful number, since it uses less digits than its factorization.

105755989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047190.

The product of its (nonzero) digits is 567000, while the sum is 49.

The square root of 105755989 is about 10283.7730916235. The cubic root of 105755989 is about 472.8989216170.

The spelling of 105755989 in words is "one hundred five million, seven hundred fifty-five thousand, nine hundred eighty-nine".