297387106561 has 2 divisors, whose sum is σ = 297387106562. Its totient is φ = 297387106560.

The previous prime is 297387106459. The next prime is 297387106591. The reversal of 297387106561 is 165601783792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216001857600 + 81385248961 = 464760^2 + 285281^2 .

It is a cyclic number.

It is not a de Polignac number, because 297387106561 - 2⁷ = 297387106433 is a prime.

It is a super-2 number, since 2×297387106561² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (297387106591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148693553280 + 148693553281.

It is an arithmetic number, because the mean of its divisors is an integer number (148693553281).

Almost surely, 2^297387106561 is an apocalyptic number.

It is an amenable number.

297387106561 is a deficient number, since it is larger than the sum of its proper divisors (1).

297387106561 is an equidigital number, since it uses as much as digits as its factorization.

297387106561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 297387106561 in words is "two hundred ninety-seven billion, three hundred eighty-seven million, one hundred six thousand, five hundred sixty-one".