72755747 has 2 divisors, whose sum is σ = 72755748. Its totient is φ = 72755746.

The previous prime is 72755741. The next prime is 72755773. The reversal of 72755747 is 74755727.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72755747 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72755698 and 72755707.

It is not a weakly prime, because it can be changed into another prime (72755741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36377873 + 36377874.

It is an arithmetic number, because the mean of its divisors is an integer number (36377874).

Almost surely, 2^72755747 is an apocalyptic number.

72755747 is a deficient number, since it is larger than the sum of its proper divisors (1).

72755747 is an equidigital number, since it uses as much as digits as its factorization.

72755747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480200, while the sum is 44.

The square root of 72755747 is about 8529.6979430693. The cubic root of 72755747 is about 417.4672727044.

The spelling of 72755747 in words is "seventy-two million, seven hundred fifty-five thousand, seven hundred forty-seven".