28297295237 has 2 divisors, whose sum is σ = 28297295238. Its totient is φ = 28297295236.

The previous prime is 28297295203. The next prime is 28297295239. The reversal of 28297295237 is 73259279282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27308884516 + 988410721 = 165254^2 + 31439^2 .

It is a cyclic number.

It is not a de Polignac number, because 28297295237 - 2¹⁰ = 28297294213 is a prime.

Together with 28297295239, 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 (28297295239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14148647618 + 14148647619.

It is an arithmetic number, because the mean of its divisors is an integer number (14148647619).

Almost surely, 2^28297295237 is an apocalyptic number.

It is an amenable number.

28297295237 is a deficient number, since it is larger than the sum of its proper divisors (1).

28297295237 is an equidigital number, since it uses as much as digits as its factorization.

28297295237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 56.

The spelling of 28297295237 in words is "twenty-eight billion, two hundred ninety-seven million, two hundred ninety-five thousand, two hundred thirty-seven".