75720773 has 2 divisors, whose sum is σ = 75720774. Its totient is φ = 75720772.

The previous prime is 75720767. The next prime is 75720779. The reversal of 75720773 is 37702757.

It is a balanced prime because it is at equal distance from previous prime (75720767) and next prime (75720779).

It can be written as a sum of positive squares in only one way, i.e., 46485124 + 29235649 = 6818^2 + 5407^2 .

It is an emirp because it is prime and its reverse (37702757) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75720773 - 2⁶ = 75720709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75720779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37860386 + 37860387.

It is an arithmetic number, because the mean of its divisors is an integer number (37860387).

Almost surely, 2^75720773 is an apocalyptic number.

It is an amenable number.

75720773 is a deficient number, since it is larger than the sum of its proper divisors (1).

75720773 is an equidigital number, since it uses as much as digits as its factorization.

75720773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72030, while the sum is 38.

The square root of 75720773 is about 8701.7683834954. The cubic root of 75720773 is about 423.0629690511.

The spelling of 75720773 in words is "seventy-five million, seven hundred twenty thousand, seven hundred seventy-three".