104910821 has 4 divisors (see below), whose sum is σ = 105949644. Its totient is φ = 103872000.

The previous prime is 104910809. The next prime is 104910829. The reversal of 104910821 is 128019401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44289025 + 60621796 = 6655^2 + 7786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104910821 is a prime.

It is a super-2 number, since 2×104910821² = 22012560725788082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104910829) 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, 519260 + ... + 519461.

It is an arithmetic number, because the mean of its divisors is an integer number (26487411).

Almost surely, 2^104910821 is an apocalyptic number.

It is an amenable number.

104910821 is a deficient number, since it is larger than the sum of its proper divisors (1038823).

104910821 is a wasteful number, since it uses less digits than its factorization.

104910821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038822.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 104910821 is about 10242.5983519808. The cubic root of 104910821 is about 471.6357985407.

The spelling of 104910821 in words is "one hundred four million, nine hundred ten thousand, eight hundred twenty-one".