71322689 has 2 divisors, whose sum is σ = 71322690. Its totient is φ = 71322688.

The previous prime is 71322677. The next prime is 71322697. The reversal of 71322689 is 98622317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56175025 + 15147664 = 7495^2 + 3892^2 .

It is an emirp because it is prime and its reverse (98622317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71322689 is a prime.

It is not a weakly prime, because it can be changed into another prime (71322649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35661344 + 35661345.

It is an arithmetic number, because the mean of its divisors is an integer number (35661345).

Almost surely, 2^71322689 is an apocalyptic number.

It is an amenable number.

71322689 is a deficient number, since it is larger than the sum of its proper divisors (1).

71322689 is an equidigital number, since it uses as much as digits as its factorization.

71322689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 71322689 is about 8445.2761352131. The cubic root of 71322689 is about 414.7081491840.

The spelling of 71322689 in words is "seventy-one million, three hundred twenty-two thousand, six hundred eighty-nine".