105404502509 has 2 divisors, whose sum is σ = 105404502510. Its totient is φ = 105404502508.

The previous prime is 105404502503. The next prime is 105404502523. The reversal of 105404502509 is 905205404501.

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., 105309985225 + 94517284 = 324515^2 + 9722^2 .

It is an emirp because it is prime and its reverse (905205404501) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105404502509 is a prime.

It is a super-2 number, since 2×105404502509² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105404502503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52702251254 + 52702251255.

It is an arithmetic number, because the mean of its divisors is an integer number (52702251255).

Almost surely, 2^105404502509 is an apocalyptic number.

It is an amenable number.

105404502509 is a deficient number, since it is larger than the sum of its proper divisors (1).

105404502509 is an equidigital number, since it uses as much as digits as its factorization.

105404502509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 105404502509 in words is "one hundred five billion, four hundred four million, five hundred two thousand, five hundred nine".