28171597 has 2 divisors, whose sum is σ = 28171598. Its totient is φ = 28171596.

The previous prime is 28171589. The next prime is 28171621. The reversal of 28171597 is 79517182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28026436 + 145161 = 5294^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 28171597 - 2³ = 28171589 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 (28171537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14085798 + 14085799.

It is an arithmetic number, because the mean of its divisors is an integer number (14085799).

Almost surely, 2^28171597 is an apocalyptic number.

It is an amenable number.

28171597 is a deficient number, since it is larger than the sum of its proper divisors (1).

28171597 is an equidigital number, since it uses as much as digits as its factorization.

28171597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 40.

The square root of 28171597 is about 5307.6922480491. The cubic root of 28171597 is about 304.2779551818.

The spelling of 28171597 in words is "twenty-eight million, one hundred seventy-one thousand, five hundred ninety-seven".