28587197 has 2 divisors, whose sum is σ = 28587198. Its totient is φ = 28587196.

The previous prime is 28587187. The next prime is 28587203. The reversal of 28587197 is 79178582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26894596 + 1692601 = 5186^2 + 1301^2 .

It is a cyclic number.

It is not a de Polignac number, because 28587197 - 2⁶ = 28587133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28587107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14293598 + 14293599.

It is an arithmetic number, because the mean of its divisors is an integer number (14293599).

Almost surely, 2^28587197 is an apocalyptic number.

It is an amenable number.

28587197 is a deficient number, since it is larger than the sum of its proper divisors (1).

28587197 is an equidigital number, since it uses as much as digits as its factorization.

28587197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 47.

The square root of 28587197 is about 5346.6996362242. The cubic root of 28587197 is about 305.7669384604.

The spelling of 28587197 in words is "twenty-eight million, five hundred eighty-seven thousand, one hundred ninety-seven".