248721913897 has 2 divisors, whose sum is σ = 248721913898. Its totient is φ = 248721913896.

The previous prime is 248721913883. The next prime is 248721913901. The reversal of 248721913897 is 798319127842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142716972841 + 106004941056 = 377779^2 + 325584^2 .

It is a cyclic number.

It is not a de Polignac number, because 248721913897 - 2¹⁵ = 248721881129 is a prime.

It is not a weakly prime, because it can be changed into another prime (248721913877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124360956948 + 124360956949.

It is an arithmetic number, because the mean of its divisors is an integer number (124360956949).

Almost surely, 2^248721913897 is an apocalyptic number.

It is an amenable number.

248721913897 is a deficient number, since it is larger than the sum of its proper divisors (1).

248721913897 is an equidigital number, since it uses as much as digits as its factorization.

248721913897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 61.

The spelling of 248721913897 in words is "two hundred forty-eight billion, seven hundred twenty-one million, nine hundred thirteen thousand, eight hundred ninety-seven".