28243597 has 2 divisors, whose sum is σ = 28243598. Its totient is φ = 28243596.

The previous prime is 28243583. The next prime is 28243601. The reversal of 28243597 is 79534282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 13351716 = 3859^2 + 3654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28243597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28243507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14121798 + 14121799.

It is an arithmetic number, because the mean of its divisors is an integer number (14121799).

Almost surely, 2^28243597 is an apocalyptic number.

It is an amenable number.

28243597 is a deficient number, since it is larger than the sum of its proper divisors (1).

28243597 is an equidigital number, since it uses as much as digits as its factorization.

28243597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 28243597 is about 5314.4705286604. The cubic root of 28243597 is about 304.5369557077.

The spelling of 28243597 in words is "twenty-eight million, two hundred forty-three thousand, five hundred ninety-seven".