72556723 has 2 divisors, whose sum is σ = 72556724. Its totient is φ = 72556722.

The previous prime is 72556721. The next prime is 72556733. The reversal of 72556723 is 32765527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72556723 - 2¹ = 72556721 is a prime.

Together with 72556721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72556721) 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, 36278361 + 36278362.

It is an arithmetic number, because the mean of its divisors is an integer number (36278362).

Almost surely, 2^72556723 is an apocalyptic number.

72556723 is a deficient number, since it is larger than the sum of its proper divisors (1).

72556723 is an equidigital number, since it uses as much as digits as its factorization.

72556723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88200, while the sum is 37.

The square root of 72556723 is about 8518.0234209586. The cubic root of 72556723 is about 417.0862632488.

The spelling of 72556723 in words is "seventy-two million, five hundred fifty-six thousand, seven hundred twenty-three".