104731821 has 6 divisors (see below), whose sum is σ = 151279310. Its totient is φ = 69821208.

The previous prime is 104731813. The next prime is 104731829. The reversal of 104731821 is 128137401.

104731821 is a `hidden beast` number, since 10 + 473 + 182 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (104731813) and next prime (104731829).

It can be written as a sum of positive squares in only one way, i.e., 78322500 + 26409321 = 8850^2 + 5139^2 .

It is not a de Polignac number, because 104731821 - 2³ = 104731813 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 (104731829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5818426 + ... + 5818443.

Almost surely, 2^104731821 is an apocalyptic number.

It is an amenable number.

104731821 is a deficient number, since it is larger than the sum of its proper divisors (46547489).

104731821 is a wasteful number, since it uses less digits than its factorization.

104731821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11636875 (or 11636872 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 104731821 is about 10233.8566044283. The cubic root of 104731821 is about 471.3674091058.

The spelling of 104731821 in words is "one hundred four million, seven hundred thirty-one thousand, eight hundred twenty-one".