397871047933 has 2 divisors, whose sum is σ = 397871047934. Its totient is φ = 397871047932.

The previous prime is 397871047771. The next prime is 397871047939. The reversal of 397871047933 is 339740178793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 283277288644 + 114593759289 = 532238^2 + 338517^2 .

It is a cyclic number.

It is not a de Polignac number, because 397871047933 - 2⁹ = 397871047421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (397871047939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198935523966 + 198935523967.

It is an arithmetic number, because the mean of its divisors is an integer number (198935523967).

Almost surely, 2^397871047933 is an apocalyptic number.

It is an amenable number.

397871047933 is a deficient number, since it is larger than the sum of its proper divisors (1).

397871047933 is an equidigital number, since it uses as much as digits as its factorization.

397871047933 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24004512, while the sum is 61.

The spelling of 397871047933 in words is "three hundred ninety-seven billion, eight hundred seventy-one million, forty-seven thousand, nine hundred thirty-three".