104309021 has 2 divisors, whose sum is σ = 104309022. Its totient is φ = 104309020.

The previous prime is 104308951. The next prime is 104309041. The reversal of 104309021 is 120903401.

It is an a-pointer prime, because the next prime (104309041) can be obtained adding 104309021 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89208025 + 15100996 = 9445^2 + 3886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-104309021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 104308984 and 104309002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104309041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52154510 + 52154511.

It is an arithmetic number, because the mean of its divisors is an integer number (52154511).

Almost surely, 2^104309021 is an apocalyptic number.

It is an amenable number.

104309021 is a deficient number, since it is larger than the sum of its proper divisors (1).

104309021 is an equidigital number, since it uses as much as digits as its factorization.

104309021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 104309021 is about 10213.1787901711. The cubic root of 104309021 is about 470.7322537673.

The spelling of 104309021 in words is "one hundred four million, three hundred nine thousand, twenty-one".