28164197 has 2 divisors, whose sum is σ = 28164198. Its totient is φ = 28164196.

The previous prime is 28164119. The next prime is 28164221. The reversal of 28164197 is 79146182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17048641 + 11115556 = 4129^2 + 3334^2 .

It is a cyclic number.

It is not a de Polignac number, because 28164197 - 2¹⁴ = 28147813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28164197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28164107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14082098 + 14082099.

It is an arithmetic number, because the mean of its divisors is an integer number (14082099).

Almost surely, 2^28164197 is an apocalyptic number.

It is an amenable number.

28164197 is a deficient number, since it is larger than the sum of its proper divisors (1).

28164197 is an equidigital number, since it uses as much as digits as its factorization.

28164197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 28164197 is about 5306.9951008080. The cubic root of 28164197 is about 304.2513106853.

The spelling of 28164197 in words is "twenty-eight million, one hundred sixty-four thousand, one hundred ninety-seven".