71791393 has 2 divisors, whose sum is σ = 71791394. Its totient is φ = 71791392.

The previous prime is 71791387. The next prime is 71791399. The reversal of 71791393 is 39319717.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (71791387) and next prime (71791399).

It can be written as a sum of positive squares in only one way, i.e., 56370064 + 15421329 = 7508^2 + 3927^2 .

It is an emirp because it is prime and its reverse (39319717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71791393 - 2²¹ = 69694241 is a prime.

It is not a weakly prime, because it can be changed into another prime (71791399) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35895696 + 35895697.

It is an arithmetic number, because the mean of its divisors is an integer number (35895697).

Almost surely, 2^71791393 is an apocalyptic number.

It is an amenable number.

71791393 is a deficient number, since it is larger than the sum of its proper divisors (1).

71791393 is an equidigital number, since it uses as much as digits as its factorization.

71791393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35721, while the sum is 40.

The square root of 71791393 is about 8472.9801722889. The cubic root of 71791393 is about 415.6145981379.

The spelling of 71791393 in words is "seventy-one million, seven hundred ninety-one thousand, three hundred ninety-three".