71223497 has 2 divisors, whose sum is σ = 71223498. Its totient is φ = 71223496.

The previous prime is 71223491. The next prime is 71223499. The reversal of 71223497 is 79432217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46730896 + 24492601 = 6836^2 + 4949^2 .

It is a cyclic number.

It is not a de Polignac number, because 71223497 - 2⁸ = 71223241 is a prime.

Together with 71223499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71223491) 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, 35611748 + 35611749.

It is an arithmetic number, because the mean of its divisors is an integer number (35611749).

Almost surely, 2^71223497 is an apocalyptic number.

It is an amenable number.

71223497 is a deficient number, since it is larger than the sum of its proper divisors (1).

71223497 is an equidigital number, since it uses as much as digits as its factorization.

71223497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 35.

The square root of 71223497 is about 8439.4014598193. The cubic root of 71223497 is about 414.5158082618.

The spelling of 71223497 in words is "seventy-one million, two hundred twenty-three thousand, four hundred ninety-seven".