28100497 has 2 divisors, whose sum is σ = 28100498. Its totient is φ = 28100496.

The previous prime is 28100483. The next prime is 28100509. The reversal of 28100497 is 79400182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23078416 + 5022081 = 4804^2 + 2241^2 .

It is a cyclic number.

It is not a de Polignac number, because 28100497 - 2²³ = 19711889 is a prime.

It is not a weakly prime, because it can be changed into another prime (28100437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14050248 + 14050249.

It is an arithmetic number, because the mean of its divisors is an integer number (14050249).

Almost surely, 2^28100497 is an apocalyptic number.

It is an amenable number.

28100497 is a deficient number, since it is larger than the sum of its proper divisors (1).

28100497 is an equidigital number, since it uses as much as digits as its factorization.

28100497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28100497 is about 5300.9901905210. The cubic root of 28100497 is about 304.0217587438.

The spelling of 28100497 in words is "twenty-eight million, one hundred thousand, four hundred ninety-seven".