71764657 has 2 divisors, whose sum is σ = 71764658. Its totient is φ = 71764656.

The previous prime is 71764639. The next prime is 71764661. The reversal of 71764657 is 75646717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68492176 + 3272481 = 8276^2 + 1809^2 .

It is a cyclic number.

It is not a de Polignac number, because 71764657 - 2¹⁹ = 71240369 is a prime.

It is not a weakly prime, because it can be changed into another prime (71764697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35882328 + 35882329.

It is an arithmetic number, because the mean of its divisors is an integer number (35882329).

Almost surely, 2^71764657 is an apocalyptic number.

It is an amenable number.

71764657 is a deficient number, since it is larger than the sum of its proper divisors (1).

71764657 is an equidigital number, since it uses as much as digits as its factorization.

71764657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 43.

The square root of 71764657 is about 8471.4023042233. The cubic root of 71764657 is about 415.5629983982.

The spelling of 71764657 in words is "seventy-one million, seven hundred sixty-four thousand, six hundred fifty-seven".