105798509 has 2 divisors, whose sum is σ = 105798510. Its totient is φ = 105798508.

The previous prime is 105798499. The next prime is 105798527. The reversal of 105798509 is 905897501.

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., 97515625 + 8282884 = 9875^2 + 2878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105798509 is a prime.

It is a super-2 number, since 2×105798509² = 22386649013246162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 105798509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105798569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52899254 + 52899255.

It is an arithmetic number, because the mean of its divisors is an integer number (52899255).

Almost surely, 2^105798509 is an apocalyptic number.

It is an amenable number.

105798509 is a deficient number, since it is larger than the sum of its proper divisors (1).

105798509 is an equidigital number, since it uses as much as digits as its factorization.

105798509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 105798509 is about 10285.8402184751. The cubic root of 105798509 is about 472.9622906615.

The spelling of 105798509 in words is "one hundred five million, seven hundred ninety-eight thousand, five hundred nine".