71318629 has 2 divisors, whose sum is σ = 71318630. Its totient is φ = 71318628.

The previous prime is 71318617. The next prime is 71318651. The reversal of 71318629 is 92681317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49322529 + 21996100 = 7023^2 + 4690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71318629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71318729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35659314 + 35659315.

It is an arithmetic number, because the mean of its divisors is an integer number (35659315).

Almost surely, 2^71318629 is an apocalyptic number.

It is an amenable number.

71318629 is a deficient number, since it is larger than the sum of its proper divisors (1).

71318629 is an equidigital number, since it uses as much as digits as its factorization.

71318629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 71318629 is about 8445.0357607295. The cubic root of 71318629 is about 414.7002800329.

The spelling of 71318629 in words is "seventy-one million, three hundred eighteen thousand, six hundred twenty-nine".