8921761 has 2 divisors, whose sum is σ = 8921762. Its totient is φ = 8921760.

The previous prime is 8921741. The next prime is 8921771. The reversal of 8921761 is 1671298.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7667361 + 1254400 = 2769^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 8921761 - 2⁵ = 8921729 is a prime.

It is a super-2 number, since 2×8921761² = 159195638682242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8921701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4460880 + 4460881.

It is an arithmetic number, because the mean of its divisors is an integer number (4460881).

Almost surely, 2^8921761 is an apocalyptic number.

It is an amenable number.

8921761 is a deficient number, since it is larger than the sum of its proper divisors (1).

8921761 is an equidigital number, since it uses as much as digits as its factorization.

8921761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 8921761 is about 2986.9317032701. The cubic root of 8921761 is about 207.4038728308.

The spelling of 8921761 in words is "eight million, nine hundred twenty-one thousand, seven hundred sixty-one".