28029097 has 2 divisors, whose sum is σ = 28029098. Its totient is φ = 28029096.

The previous prime is 28029049. The next prime is 28029143. The reversal of 28029097 is 79092082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14220441 + 13808656 = 3771^2 + 3716^2 .

It is a cyclic number.

It is not a de Polignac number, because 28029097 - 2⁷ = 28028969 is a prime.

It is not a weakly prime, because it can be changed into another prime (28029697) 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, 14014548 + 14014549.

It is an arithmetic number, because the mean of its divisors is an integer number (14014549).

Almost surely, 2^28029097 is an apocalyptic number.

It is an amenable number.

28029097 is a deficient number, since it is larger than the sum of its proper divisors (1).

28029097 is an equidigital number, since it uses as much as digits as its factorization.

28029097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 28029097 is about 5294.2513162864. The cubic root of 28029097 is about 303.7640460462.

The spelling of 28029097 in words is "twenty-eight million, twenty-nine thousand, ninety-seven".