71730193 has 2 divisors, whose sum is σ = 71730194. Its totient is φ = 71730192.

The previous prime is 71730167. The next prime is 71730203. The reversal of 71730193 is 39103717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68013009 + 3717184 = 8247^2 + 1928^2 .

It is an emirp because it is prime and its reverse (39103717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71730193 - 2²¹ = 69633041 is a prime.

It is not a weakly prime, because it can be changed into another prime (71730143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35865096 + 35865097.

It is an arithmetic number, because the mean of its divisors is an integer number (35865097).

Almost surely, 2^71730193 is an apocalyptic number.

It is an amenable number.

71730193 is a deficient number, since it is larger than the sum of its proper divisors (1).

71730193 is an equidigital number, since it uses as much as digits as its factorization.

71730193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 71730193 is about 8469.3679221061. The cubic root of 71730193 is about 415.4964649214.

The spelling of 71730193 in words is "seventy-one million, seven hundred thirty thousand, one hundred ninety-three".