971272639 has 2 divisors, whose sum is σ = 971272640. Its totient is φ = 971272638.

The previous prime is 971272637. The next prime is 971272663. The reversal of 971272639 is 936272179.

It is a weak prime.

It is an emirp because it is prime and its reverse (936272179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 971272639 - 2¹ = 971272637 is a prime.

Together with 971272637, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (971272637) 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, 485636319 + 485636320.

It is an arithmetic number, because the mean of its divisors is an integer number (485636320).

Almost surely, 2^971272639 is an apocalyptic number.

971272639 is a deficient number, since it is larger than the sum of its proper divisors (1).

971272639 is an equidigital number, since it uses as much as digits as its factorization.

971272639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 46.

The square root of 971272639 is about 31165.2472956657. The cubic root of 971272639 is about 990.3310252416.

The spelling of 971272639 in words is "nine hundred seventy-one million, two hundred seventy-two thousand, six hundred thirty-nine".