28130981597 has 2 divisors, whose sum is σ = 28130981598. Its totient is φ = 28130981596.

The previous prime is 28130981579. The next prime is 28130981629. The reversal of 28130981597 is 79518903182.

It is a happy number.

Together with previous prime (28130981579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26345834596 + 1785147001 = 162314^2 + 42251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28130981597 is a prime.

It is a super-2 number, since 2×28130981597² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28130981537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14065490798 + 14065490799.

It is an arithmetic number, because the mean of its divisors is an integer number (14065490799).

Almost surely, 2^28130981597 is an apocalyptic number.

It is an amenable number.

28130981597 is a deficient number, since it is larger than the sum of its proper divisors (1).

28130981597 is an equidigital number, since it uses as much as digits as its factorization.

28130981597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The spelling of 28130981597 in words is "twenty-eight billion, one hundred thirty million, nine hundred eighty-one thousand, five hundred ninety-seven".