105004643621 has 4 divisors (see below), whose sum is σ = 105005389644. Its totient is φ = 105003897600.

The previous prime is 105004643587. The next prime is 105004643633. The reversal of 105004643621 is 126346400501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 100751647396 + 4252996225 = 317414^2 + 65215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105004643621 is a prime.

It is a super-3 number, since 3×105004643621³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105004648621) 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, 90620 + ... + 467141.

It is an arithmetic number, because the mean of its divisors is an integer number (26251347411).

Almost surely, 2^105004643621 is an apocalyptic number.

It is an amenable number.

105004643621 is a deficient number, since it is larger than the sum of its proper divisors (746023).

105004643621 is an equidigital number, since it uses as much as digits as its factorization.

105004643621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746022.

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 105004643621 in words is "one hundred five billion, four million, six hundred forty-three thousand, six hundred twenty-one".