71344393937 has 2 divisors, whose sum is σ = 71344393938. Its totient is φ = 71344393936.

The previous prime is 71344393927. The next prime is 71344394021. The reversal of 71344393937 is 73939344317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70403192896 + 941201041 = 265336^2 + 30679^2 .

It is a cyclic number.

It is not a de Polignac number, because 71344393937 - 2²⁰ = 71343345361 is a prime.

It is not a weakly prime, because it can be changed into another prime (71344393927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35672196968 + 35672196969.

It is an arithmetic number, because the mean of its divisors is an integer number (35672196969).

Almost surely, 2^71344393937 is an apocalyptic number.

It is an amenable number.

71344393937 is a deficient number, since it is larger than the sum of its proper divisors (1).

71344393937 is an equidigital number, since it uses as much as digits as its factorization.

71344393937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 53.

The spelling of 71344393937 in words is "seventy-one billion, three hundred forty-four million, three hundred ninety-three thousand, nine hundred thirty-seven".