397871047771 has 2 divisors, whose sum is σ = 397871047772. Its totient is φ = 397871047770.

The previous prime is 397871047733. The next prime is 397871047933. The reversal of 397871047771 is 177740178793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 397871047771 - 2¹¹ = 397871045723 is a prime.

It is not a weakly prime, because it can be changed into another prime (397871047271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198935523885 + 198935523886.

It is an arithmetic number, because the mean of its divisors is an integer number (198935523886).

Almost surely, 2^397871047771 is an apocalyptic number.

397871047771 is a deficient number, since it is larger than the sum of its proper divisors (1).

397871047771 is an equidigital number, since it uses as much as digits as its factorization.

397871047771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14521248, while the sum is 61.

The spelling of 397871047771 in words is "three hundred ninety-seven billion, eight hundred seventy-one million, forty-seven thousand, seven hundred seventy-one".