28097497 has 2 divisors, whose sum is σ = 28097498. Its totient is φ = 28097496.

The previous prime is 28097483. The next prime is 28097507. The reversal of 28097497 is 79479082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25613721 + 2483776 = 5061^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 28097497 - 2¹¹ = 28095449 is a prime.

It is not a weakly prime, because it can be changed into another prime (28097417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14048748 + 14048749.

It is an arithmetic number, because the mean of its divisors is an integer number (14048749).

Almost surely, 2^28097497 is an apocalyptic number.

It is an amenable number.

28097497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28097497 is an equidigital number, since it uses as much as digits as its factorization.

28097497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 28097497 is about 5300.7072169664. The cubic root of 28097497 is about 304.0109392705.

The spelling of 28097497 in words is "twenty-eight million, ninety-seven thousand, four hundred ninety-seven".