72757939 has 2 divisors, whose sum is σ = 72757940. Its totient is φ = 72757938.

The previous prime is 72757921. The next prime is 72757957. The reversal of 72757939 is 93975727.

It is a balanced prime because it is at equal distance from previous prime (72757921) and next prime (72757957).

It is an emirp because it is prime and its reverse (93975727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72757939 - 2⁵ = 72757907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72757892 and 72757901.

It is not a weakly prime, because it can be changed into another prime (72757999) 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, 36378969 + 36378970.

It is an arithmetic number, because the mean of its divisors is an integer number (36378970).

Almost surely, 2^72757939 is an apocalyptic number.

72757939 is a deficient number, since it is larger than the sum of its proper divisors (1).

72757939 is an equidigital number, since it uses as much as digits as its factorization.

72757939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 833490, while the sum is 49.

The square root of 72757939 is about 8529.8264343420. The cubic root of 72757939 is about 417.4714651754.

The spelling of 72757939 in words is "seventy-two million, seven hundred fifty-seven thousand, nine hundred thirty-nine".