71164427 has 2 divisors, whose sum is σ = 71164428. Its totient is φ = 71164426.

The previous prime is 71164421. The next prime is 71164487. The reversal of 71164427 is 72446117.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71164427 - 2⁴ = 71164411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71164393 and 71164402.

It is not a weakly prime, because it can be changed into another prime (71164421) 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, 35582213 + 35582214.

It is an arithmetic number, because the mean of its divisors is an integer number (35582214).

Almost surely, 2^71164427 is an apocalyptic number.

71164427 is a deficient number, since it is larger than the sum of its proper divisors (1).

71164427 is an equidigital number, since it uses as much as digits as its factorization.

71164427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 71164427 is about 8435.9010781303. The cubic root of 71164427 is about 414.4011821340.

The spelling of 71164427 in words is "seventy-one million, one hundred sixty-four thousand, four hundred twenty-seven".