28321051937 has 2 divisors, whose sum is σ = 28321051938. Its totient is φ = 28321051936.

The previous prime is 28321051921. The next prime is 28321051981. The reversal of 28321051937 is 73915012382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20109792481 + 8211259456 = 141809^2 + 90616^2 .

It is a cyclic number.

It is not a de Polignac number, because 28321051937 - 2⁴ = 28321051921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28321051894 and 28321051903.

It is not a weakly prime, because it can be changed into another prime (28321051037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14160525968 + 14160525969.

It is an arithmetic number, because the mean of its divisors is an integer number (14160525969).

Almost surely, 2^28321051937 is an apocalyptic number.

It is an amenable number.

28321051937 is a deficient number, since it is larger than the sum of its proper divisors (1).

28321051937 is an equidigital number, since it uses as much as digits as its factorization.

28321051937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 28321051937 in words is "twenty-eight billion, three hundred twenty-one million, fifty-one thousand, nine hundred thirty-seven".