8821129 has 2 divisors, whose sum is σ = 8821130. Its totient is φ = 8821128.

The previous prime is 8821103. The next prime is 8821139. The reversal of 8821129 is 9211288.

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., 4928400 + 3892729 = 2220^2 + 1973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8821129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8821129.

It is not a weakly prime, because it can be changed into another prime (8821139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4410564 + 4410565.

It is an arithmetic number, because the mean of its divisors is an integer number (4410565).

Almost surely, 2^8821129 is an apocalyptic number.

It is an amenable number.

8821129 is a deficient number, since it is larger than the sum of its proper divisors (1).

8821129 is an equidigital number, since it uses as much as digits as its factorization.

8821129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 31.

The square root of 8821129 is about 2970.0385519383. The cubic root of 8821129 is about 206.6211262241.

The spelling of 8821129 in words is "eight million, eight hundred twenty-one thousand, one hundred twenty-nine".