163982971 has 2 divisors, whose sum is σ = 163982972. Its totient is φ = 163982970.

The previous prime is 163982911. The next prime is 163982981. The reversal of 163982971 is 179289361.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163982971 - 2⁷ = 163982843 is a prime.

It is not a weakly prime, because it can be changed into another prime (163982911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81991485 + 81991486.

It is an arithmetic number, because the mean of its divisors is an integer number (81991486).

Almost surely, 2^163982971 is an apocalyptic number.

163982971 is a deficient number, since it is larger than the sum of its proper divisors (1).

163982971 is an equidigital number, since it uses as much as digits as its factorization.

163982971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 163982971 is about 12805.5835868577. The cubic root of 163982971 is about 547.3514213566.

The spelling of 163982971 in words is "one hundred sixty-three million, nine hundred eighty-two thousand, nine hundred seventy-one".