297478978873 has 2 divisors, whose sum is σ = 297478978874. Its totient is φ = 297478978872.

The previous prime is 297478978861. The next prime is 297478978961. The reversal of 297478978873 is 378879874792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295878338809 + 1600640064 = 543947^2 + 40008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-297478978873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 297478978793 and 297478978802.

It is not a weakly prime, because it can be changed into another prime (297478978843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148739489436 + 148739489437.

It is an arithmetic number, because the mean of its divisors is an integer number (148739489437).

Almost surely, 2^297478978873 is an apocalyptic number.

It is an amenable number.

297478978873 is a deficient number, since it is larger than the sum of its proper divisors (1).

297478978873 is an equidigital number, since it uses as much as digits as its factorization.

297478978873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2389782528, while the sum is 79.

The spelling of 297478978873 in words is "two hundred ninety-seven billion, four hundred seventy-eight million, nine hundred seventy-eight thousand, eight hundred seventy-three".