71427757 has 2 divisors, whose sum is σ = 71427758. Its totient is φ = 71427756.

The previous prime is 71427749. The next prime is 71427787. The reversal of 71427757 is 75772417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53963716 + 17464041 = 7346^2 + 4179^2 .

It is a cyclic number.

It is not a de Polignac number, because 71427757 - 2³ = 71427749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71427787) 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, 35713878 + 35713879.

It is an arithmetic number, because the mean of its divisors is an integer number (35713879).

Almost surely, 2^71427757 is an apocalyptic number.

It is an amenable number.

71427757 is a deficient number, since it is larger than the sum of its proper divisors (1).

71427757 is an equidigital number, since it uses as much as digits as its factorization.

71427757 is an odious number, because the sum of its binary digits is odd.

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

The square root of 71427757 is about 8451.4943649038. The cubic root of 71427757 is about 414.9116897301.

The spelling of 71427757 in words is "seventy-one million, four hundred twenty-seven thousand, seven hundred fifty-seven".