8704621 has 2 divisors, whose sum is σ = 8704622. Its totient is φ = 8704620.

The previous prime is 8704613. The next prime is 8704651. The reversal of 8704621 is 1264078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8555625 + 148996 = 2925^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 8704621 - 2³ = 8704613 is a prime.

8704621 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8704621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8704601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4352310 + 4352311.

It is an arithmetic number, because the mean of its divisors is an integer number (4352311).

Almost surely, 2^8704621 is an apocalyptic number.

It is an amenable number.

8704621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8704621 is an equidigital number, since it uses as much as digits as its factorization.

8704621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 8704621 is about 2950.3594696240. The cubic root of 8704621 is about 205.7074191886.

Adding to 8704621 its reverse (1264078), we get a palindrome (9968699).

The spelling of 8704621 in words is "eight million, seven hundred four thousand, six hundred twenty-one".