71444497 has 2 divisors, whose sum is σ = 71444498. Its totient is φ = 71444496.

The previous prime is 71444479. The next prime is 71444533. The reversal of 71444497 is 79444417.

Together with previous prime (71444479) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66080641 + 5363856 = 8129^2 + 2316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71444497 is a prime.

It is not a weakly prime, because it can be changed into another prime (71444407) 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, 35722248 + 35722249.

It is an arithmetic number, because the mean of its divisors is an integer number (35722249).

Almost surely, 2^71444497 is an apocalyptic number.

It is an amenable number.

71444497 is a deficient number, since it is larger than the sum of its proper divisors (1).

71444497 is an equidigital number, since it uses as much as digits as its factorization.

71444497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 71444497 is about 8452.4846642866. The cubic root of 71444497 is about 414.9441004691.

The spelling of 71444497 in words is "seventy-one million, four hundred forty-four thousand, four hundred ninety-seven".