971279143 has 2 divisors, whose sum is σ = 971279144. Its totient is φ = 971279142.

The previous prime is 971279093. The next prime is 971279203. The reversal of 971279143 is 341972179.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 971279143 - 2⁹ = 971278631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 971279143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971273143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485639571 + 485639572.

It is an arithmetic number, because the mean of its divisors is an integer number (485639572).

Almost surely, 2^971279143 is an apocalyptic number.

971279143 is a deficient number, since it is larger than the sum of its proper divisors (1).

971279143 is an equidigital number, since it uses as much as digits as its factorization.

971279143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 43.

The square root of 971279143 is about 31165.3516424891. The cubic root of 971279143 is about 990.3332357773. Note that the first 3 decimals are identical.

The spelling of 971279143 in words is "nine hundred seventy-one million, two hundred seventy-nine thousand, one hundred forty-three".