28797149 has 2 divisors, whose sum is σ = 28797150. Its totient is φ = 28797148.

The previous prime is 28797101. The next prime is 28797151. The reversal of 28797149 is 94179782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28783225 + 13924 = 5365^2 + 118^2 .

It is a cyclic number.

It is not a de Polignac number, because 28797149 - 2⁸ = 28796893 is a prime.

Together with 28797151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28797649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14398574 + 14398575.

It is an arithmetic number, because the mean of its divisors is an integer number (14398575).

Almost surely, 2^28797149 is an apocalyptic number.

It is an amenable number.

28797149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28797149 is an equidigital number, since it uses as much as digits as its factorization.

28797149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 47.

The square root of 28797149 is about 5366.2975131836. The cubic root of 28797149 is about 306.5136580487.

The spelling of 28797149 in words is "twenty-eight million, seven hundred ninety-seven thousand, one hundred forty-nine".