28869101 has 2 divisors, whose sum is σ = 28869102. Its totient is φ = 28869100.

The previous prime is 28869089. The next prime is 28869103. The reversal of 28869101 is 10196882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15721225 + 13147876 = 3965^2 + 3626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28869101 is a prime.

Together with 28869103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28869103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14434550 + 14434551.

It is an arithmetic number, because the mean of its divisors is an integer number (14434551).

Almost surely, 2^28869101 is an apocalyptic number.

It is an amenable number.

28869101 is a deficient number, since it is larger than the sum of its proper divisors (1).

28869101 is an equidigital number, since it uses as much as digits as its factorization.

28869101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 28869101 is about 5372.9973943787. The cubic root of 28869101 is about 306.7687287625.

The spelling of 28869101 in words is "twenty-eight million, eight hundred sixty-nine thousand, one hundred one".