297648846821 has 2 divisors, whose sum is σ = 297648846822. Its totient is φ = 297648846820.

The previous prime is 297648846791. The next prime is 297648846919. The reversal of 297648846821 is 128648846792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257900449921 + 39748396900 = 507839^2 + 199370^2 .

It is a cyclic number.

It is not a de Polignac number, because 297648846821 - 2³⁰ = 296575104997 is a prime.

It is a super-2 number, since 2×297648846821² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (297648840821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148824423410 + 148824423411.

It is an arithmetic number, because the mean of its divisors is an integer number (148824423411).

Almost surely, 2^297648846821 is an apocalyptic number.

It is an amenable number.

297648846821 is a deficient number, since it is larger than the sum of its proper divisors (1).

297648846821 is an equidigital number, since it uses as much as digits as its factorization.

297648846821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74317824, while the sum is 65.

The spelling of 297648846821 in words is "two hundred ninety-seven billion, six hundred forty-eight million, eight hundred forty-six thousand, eight hundred twenty-one".