72711757 has 2 divisors, whose sum is σ = 72711758. Its totient is φ = 72711756.

The previous prime is 72711713. The next prime is 72711781. The reversal of 72711757 is 75711727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38266596 + 34445161 = 6186^2 + 5869^2 .

It is a cyclic number.

It is not a de Polignac number, because 72711757 - 2⁷ = 72711629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72711557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36355878 + 36355879.

It is an arithmetic number, because the mean of its divisors is an integer number (36355879).

Almost surely, 2^72711757 is an apocalyptic number.

It is an amenable number.

72711757 is a deficient number, since it is larger than the sum of its proper divisors (1).

72711757 is an equidigital number, since it uses as much as digits as its factorization.

72711757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24010, while the sum is 37.

The square root of 72711757 is about 8527.1189155541. The cubic root of 72711757 is about 417.3831185836.

The spelling of 72711757 in words is "seventy-two million, seven hundred eleven thousand, seven hundred fifty-seven".