72755773 has 2 divisors, whose sum is σ = 72755774. Its totient is φ = 72755772.

The previous prime is 72755747. The next prime is 72755777. The reversal of 72755773 is 37755727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72641529 + 114244 = 8523^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 72755773 - 2⁵ = 72755741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72755777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36377886 + 36377887.

It is an arithmetic number, because the mean of its divisors is an integer number (36377887).

Almost surely, 2^72755773 is an apocalyptic number.

It is an amenable number.

72755773 is a deficient number, since it is larger than the sum of its proper divisors (1).

72755773 is an equidigital number, since it uses as much as digits as its factorization.

72755773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360150, while the sum is 43.

The square root of 72755773 is about 8529.6994671559. The cubic root of 72755773 is about 417.4673224331.

The spelling of 72755773 in words is "seventy-two million, seven hundred fifty-five thousand, seven hundred seventy-three".