28017697 has 2 divisors, whose sum is σ = 28017698. Its totient is φ = 28017696.

The previous prime is 28017677. The next prime is 28017721. The reversal of 28017697 is 79671082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27783441 + 234256 = 5271^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 28017697 - 2¹⁹ = 27493409 is a prime.

It is not a weakly prime, because it can be changed into another prime (28017677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14008848 + 14008849.

It is an arithmetic number, because the mean of its divisors is an integer number (14008849).

Almost surely, 2^28017697 is an apocalyptic number.

It is an amenable number.

28017697 is a deficient number, since it is larger than the sum of its proper divisors (1).

28017697 is an equidigital number, since it uses as much as digits as its factorization.

28017697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 28017697 is about 5293.1745673084. The cubic root of 28017697 is about 303.7228581369.

The spelling of 28017697 in words is "twenty-eight million, seventeen thousand, six hundred ninety-seven".