28497193 has 2 divisors, whose sum is σ = 28497194. Its totient is φ = 28497192.

The previous prime is 28497179. The next prime is 28497197. The reversal of 28497193 is 39179482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 3125824 = 5037^2 + 1768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28497193 is a prime.

It is not a weakly prime, because it can be changed into another prime (28497197) 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, 14248596 + 14248597.

It is an arithmetic number, because the mean of its divisors is an integer number (14248597).

Almost surely, 2^28497193 is an apocalyptic number.

It is an amenable number.

28497193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28497193 is an equidigital number, since it uses as much as digits as its factorization.

28497193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 28497193 is about 5338.2762199047. The cubic root of 28497193 is about 305.4457086483.

The spelling of 28497193 in words is "twenty-eight million, four hundred ninety-seven thousand, one hundred ninety-three".