28813129 has 2 divisors, whose sum is σ = 28813130. Its totient is φ = 28813128.

The previous prime is 28813087. The next prime is 28813133. The reversal of 28813129 is 92131882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21603904 + 7209225 = 4648^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 28813129 - 2¹⁵ = 28780361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28813094 and 28813103.

It is not a weakly prime, because it can be changed into another prime (28813189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14406564 + 14406565.

It is an arithmetic number, because the mean of its divisors is an integer number (14406565).

Almost surely, 2^28813129 is an apocalyptic number.

It is an amenable number.

28813129 is a deficient number, since it is larger than the sum of its proper divisors (1).

28813129 is an equidigital number, since it uses as much as digits as its factorization.

28813129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 28813129 is about 5367.7862289775. The cubic root of 28813129 is about 306.5703440135.

The spelling of 28813129 in words is "twenty-eight million, eight hundred thirteen thousand, one hundred twenty-nine".