71625577 has 2 divisors, whose sum is σ = 71625578. Its totient is φ = 71625576.

The previous prime is 71625551. The next prime is 71625661. The reversal of 71625577 is 77552617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70913241 + 712336 = 8421^2 + 844^2 .

It is an emirp because it is prime and its reverse (77552617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71625577 - 2¹¹ = 71623529 is a prime.

It is not a weakly prime, because it can be changed into another prime (71625677) 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, 35812788 + 35812789.

It is an arithmetic number, because the mean of its divisors is an integer number (35812789).

Almost surely, 2^71625577 is an apocalyptic number.

It is an amenable number.

71625577 is a deficient number, since it is larger than the sum of its proper divisors (1).

71625577 is an equidigital number, since it uses as much as digits as its factorization.

71625577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102900, while the sum is 40.

The square root of 71625577 is about 8463.1895287770. The cubic root of 71625577 is about 415.2943709101.

The spelling of 71625577 in words is "seventy-one million, six hundred twenty-five thousand, five hundred seventy-seven".