8759921 has 2 divisors, whose sum is σ = 8759922. Its totient is φ = 8759920.

The previous prime is 8759899. The next prime is 8759951. The reversal of 8759921 is 1299578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6964321 + 1795600 = 2639^2 + 1340^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8759921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8759951) 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, 4379960 + 4379961.

It is an arithmetic number, because the mean of its divisors is an integer number (4379961).

Almost surely, 2^8759921 is an apocalyptic number.

It is an amenable number.

8759921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8759921 is an equidigital number, since it uses as much as digits as its factorization.

8759921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 41.

The square root of 8759921 is about 2959.7163715464. The cubic root of 8759921 is about 206.1421160916.

The spelling of 8759921 in words is "eight million, seven hundred fifty-nine thousand, nine hundred twenty-one".