72741577 has 2 divisors, whose sum is σ = 72741578. Its totient is φ = 72741576.

The previous prime is 72741551. The next prime is 72741601. The reversal of 72741577 is 77514727.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68293696 + 4447881 = 8264^2 + 2109^2 .

It is a cyclic number.

It is not a de Polignac number, because 72741577 - 2¹¹ = 72739529 is a prime.

It is not a weakly prime, because it can be changed into another prime (72741677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36370788 + 36370789.

It is an arithmetic number, because the mean of its divisors is an integer number (36370789).

Almost surely, 2^72741577 is an apocalyptic number.

It is an amenable number.

72741577 is a deficient number, since it is larger than the sum of its proper divisors (1).

72741577 is an equidigital number, since it uses as much as digits as its factorization.

72741577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96040, while the sum is 40.

The square root of 72741577 is about 8528.8672753186. The cubic root of 72741577 is about 417.4401687959.

The spelling of 72741577 in words is "seventy-two million, seven hundred forty-one thousand, five hundred seventy-seven".