71163979 has 2 divisors, whose sum is σ = 71163980. Its totient is φ = 71163978.

The previous prime is 71163929. The next prime is 71164019. The reversal of 71163979 is 97936117.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71163979 - 2⁹ = 71163467 is a prime.

It is a super-2 number, since 2×71163979² = 10128623814224882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71163919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35581989 + 35581990.

It is an arithmetic number, because the mean of its divisors is an integer number (35581990).

Almost surely, 2^71163979 is an apocalyptic number.

71163979 is a deficient number, since it is larger than the sum of its proper divisors (1).

71163979 is an equidigital number, since it uses as much as digits as its factorization.

71163979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 71163979 is about 8435.8745249085. The cubic root of 71163979 is about 414.4003125417.

The spelling of 71163979 in words is "seventy-one million, one hundred sixty-three thousand, nine hundred seventy-nine".