28097233 has 2 divisors, whose sum is σ = 28097234. Its totient is φ = 28097232.

The previous prime is 28097231. The next prime is 28097287. The reversal of 28097233 is 33279082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25080064 + 3017169 = 5008^2 + 1737^2 .

It is a cyclic number.

It is not a de Polignac number, because 28097233 - 2¹ = 28097231 is a prime.

Together with 28097231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28097231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14048616 + 14048617.

It is an arithmetic number, because the mean of its divisors is an integer number (14048617).

Almost surely, 2^28097233 is an apocalyptic number.

It is an amenable number.

28097233 is a deficient number, since it is larger than the sum of its proper divisors (1).

28097233 is an equidigital number, since it uses as much as digits as its factorization.

28097233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 28097233 is about 5300.6823145705. The cubic root of 28097233 is about 304.0099871200.

The spelling of 28097233 in words is "twenty-eight million, ninety-seven thousand, two hundred thirty-three".