9131971663 has 2 divisors, whose sum is σ = 9131971664. Its totient is φ = 9131971662.

The previous prime is 9131971621. The next prime is 9131971669. The reversal of 9131971663 is 3661791319.

It is a strong prime.

It is an emirp because it is prime and its reverse (3661791319) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9131971663 - 2⁹ = 9131971151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9131971669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4565985831 + 4565985832.

It is an arithmetic number, because the mean of its divisors is an integer number (4565985832).

Almost surely, 2^9131971663 is an apocalyptic number.

9131971663 is a deficient number, since it is larger than the sum of its proper divisors (1).

9131971663 is an equidigital number, since it uses as much as digits as its factorization.

9131971663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 46.

The square root of 9131971663 is about 95561.3502573085. The cubic root of 9131971663 is about 2090.2016443496.

The spelling of 9131971663 in words is "nine billion, one hundred thirty-one million, nine hundred seventy-one thousand, six hundred sixty-three".