971656627 has 2 divisors, whose sum is σ = 971656628. Its totient is φ = 971656626.

The previous prime is 971656541. The next prime is 971656649. The reversal of 971656627 is 726656179.

It is a strong prime.

It is an emirp because it is prime and its reverse (726656179) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971656627 is a prime.

It is not a weakly prime, because it can be changed into another prime (971656657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485828313 + 485828314.

It is an arithmetic number, because the mean of its divisors is an integer number (485828314).

Almost surely, 2^971656627 is an apocalyptic number.

971656627 is a deficient number, since it is larger than the sum of its proper divisors (1).

971656627 is an equidigital number, since it uses as much as digits as its factorization.

971656627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The square root of 971656627 is about 31171.4072027555. The cubic root of 971656627 is about 990.4615155942.

The spelling of 971656627 in words is "nine hundred seventy-one million, six hundred fifty-six thousand, six hundred twenty-seven".