71604193 has 2 divisors, whose sum is σ = 71604194. Its totient is φ = 71604192.

The previous prime is 71604191. The next prime is 71604263. The reversal of 71604193 is 39140617.

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., 52533504 + 19070689 = 7248^2 + 4367^2 .

It is an emirp because it is prime and its reverse (39140617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71604193 - 2¹ = 71604191 is a prime.

Together with 71604191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71604191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35802096 + 35802097.

It is an arithmetic number, because the mean of its divisors is an integer number (35802097).

Almost surely, 2^71604193 is an apocalyptic number.

It is an amenable number.

71604193 is a deficient number, since it is larger than the sum of its proper divisors (1).

71604193 is an equidigital number, since it uses as much as digits as its factorization.

71604193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 71604193 is about 8461.9260809818. The cubic root of 71604193 is about 415.2530377294.

The spelling of 71604193 in words is "seventy-one million, six hundred four thousand, one hundred ninety-three".