28549897 has 2 divisors, whose sum is σ = 28549898. Its totient is φ = 28549896.

The previous prime is 28549883. The next prime is 28549901. The reversal of 28549897 is 79894582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21939856 + 6610041 = 4684^2 + 2571^2 .

It is a cyclic number.

It is not a de Polignac number, because 28549897 - 2¹⁹ = 28025609 is a prime.

It is not a weakly prime, because it can be changed into another prime (28549867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14274948 + 14274949.

It is an arithmetic number, because the mean of its divisors is an integer number (14274949).

Almost surely, 2^28549897 is an apocalyptic number.

It is an amenable number.

28549897 is a deficient number, since it is larger than the sum of its proper divisors (1).

28549897 is an equidigital number, since it uses as much as digits as its factorization.

28549897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 52.

The square root of 28549897 is about 5343.2103645655. The cubic root of 28549897 is about 305.6338943942.

The spelling of 28549897 in words is "twenty-eight million, five hundred forty-nine thousand, eight hundred ninety-seven".