71443013 has 2 divisors, whose sum is σ = 71443014. Its totient is φ = 71443012.

The previous prime is 71442953. The next prime is 71443019. The reversal of 71443013 is 31034417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71351809 + 91204 = 8447^2 + 302^2 .

It is a cyclic number.

It is not a de Polignac number, because 71443013 - 2¹⁰ = 71441989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71443013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71443019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35721506 + 35721507.

It is an arithmetic number, because the mean of its divisors is an integer number (35721507).

Almost surely, 2^71443013 is an apocalyptic number.

It is an amenable number.

71443013 is a deficient number, since it is larger than the sum of its proper divisors (1).

71443013 is an equidigital number, since it uses as much as digits as its factorization.

71443013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 71443013 is about 8452.3968789924. The cubic root of 71443013 is about 414.9412274635.

The spelling of 71443013 in words is "seventy-one million, four hundred forty-three thousand, thirteen".