104776821 has 10 divisors (see below), whose sum is σ = 156518582. Its totient is φ = 69851160.

The previous prime is 104776801. The next prime is 104776871. The reversal of 104776821 is 128677401.

It can be written as a sum of positive squares in only one way, i.e., 103428900 + 1347921 = 10170^2 + 1161^2 .

It is not a de Polignac number, because 104776821 - 2⁶ = 104776757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104776801) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 646690 + ... + 646851.

Almost surely, 2^104776821 is an apocalyptic number.

It is an amenable number.

104776821 is a deficient number, since it is larger than the sum of its proper divisors (51741761).

104776821 is an equidigital number, since it uses as much as digits as its factorization.

104776821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293553 (or 1293544 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 104776821 is about 10236.0549529592. The cubic root of 104776821 is about 471.4349100683.

The spelling of 104776821 in words is "one hundred four million, seven hundred seventy-six thousand, eight hundred twenty-one".