71755573 has 2 divisors, whose sum is σ = 71755574. Its totient is φ = 71755572.

The previous prime is 71755559. The next prime is 71755577. The reversal of 71755573 is 37555717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57790404 + 13965169 = 7602^2 + 3737^2 .

It is an emirp because it is prime and its reverse (37555717) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71755573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71755577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35877786 + 35877787.

It is an arithmetic number, because the mean of its divisors is an integer number (35877787).

Almost surely, 2^71755573 is an apocalyptic number.

It is an amenable number.

71755573 is a deficient number, since it is larger than the sum of its proper divisors (1).

71755573 is an equidigital number, since it uses as much as digits as its factorization.

71755573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128625, while the sum is 40.

The square root of 71755573 is about 8470.8661304497. The cubic root of 71755573 is about 415.5454636129.

The spelling of 71755573 in words is "seventy-one million, seven hundred fifty-five thousand, five hundred seventy-three".