28084012097 has 2 divisors, whose sum is σ = 28084012098. Its totient is φ = 28084012096.

The previous prime is 28084012091. The next prime is 28084012109. The reversal of 28084012097 is 79021048082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14982004801 + 13102007296 = 122401^2 + 114464^2 .

It is a cyclic number.

It is not a de Polignac number, because 28084012097 - 2⁸ = 28084011841 is a prime.

It is not a weakly prime, because it can be changed into another prime (28084012091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14042006048 + 14042006049.

It is an arithmetic number, because the mean of its divisors is an integer number (14042006049).

Almost surely, 2^28084012097 is an apocalyptic number.

It is an amenable number.

28084012097 is a deficient number, since it is larger than the sum of its proper divisors (1).

28084012097 is an equidigital number, since it uses as much as digits as its factorization.

28084012097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 28084012097 in words is "twenty-eight billion, eighty-four million, twelve thousand, ninety-seven".