8631971983 has 2 divisors, whose sum is σ = 8631971984. Its totient is φ = 8631971982.

The previous prime is 8631971977. The next prime is 8631971987. The reversal of 8631971983 is 3891791368.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8631971983 - 2²⁵ = 8598417551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8631971987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4315985991 + 4315985992.

It is an arithmetic number, because the mean of its divisors is an integer number (4315985992).

Almost surely, 2^8631971983 is an apocalyptic number.

8631971983 is a deficient number, since it is larger than the sum of its proper divisors (1).

8631971983 is an equidigital number, since it uses as much as digits as its factorization.

8631971983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The square root of 8631971983 is about 92908.4064172882. The cubic root of 8631971983 is about 2051.3353966623.

The spelling of 8631971983 in words is "eight billion, six hundred thirty-one million, nine hundred seventy-one thousand, nine hundred eighty-three".