971365543 has 2 divisors, whose sum is σ = 971365544. Its totient is φ = 971365542.

The previous prime is 971365511. The next prime is 971365553. The reversal of 971365543 is 345563179.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 971365543 - 2⁵ = 971365511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 971365543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971365553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485682771 + 485682772.

It is an arithmetic number, because the mean of its divisors is an integer number (485682772).

Almost surely, 2^971365543 is an apocalyptic number.

971365543 is a deficient number, since it is larger than the sum of its proper divisors (1).

971365543 is an equidigital number, since it uses as much as digits as its factorization.

971365543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 43.

The square root of 971365543 is about 31166.7377664073. The cubic root of 971365543 is about 990.3625998914.

The spelling of 971365543 in words is "nine hundred seventy-one million, three hundred sixty-five thousand, five hundred forty-three".