457718647 has 2 divisors, whose sum is σ = 457718648. Its totient is φ = 457718646.

The previous prime is 457718633. The next prime is 457718717. The reversal of 457718647 is 746817754.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457718647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 457718647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (457713647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228859323 + 228859324.

It is an arithmetic number, because the mean of its divisors is an integer number (228859324).

Almost surely, 2^457718647 is an apocalyptic number.

457718647 is a deficient number, since it is larger than the sum of its proper divisors (1).

457718647 is an equidigital number, since it uses as much as digits as its factorization.

457718647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1317120, while the sum is 49.

The square root of 457718647 is about 21394.3601680443. The cubic root of 457718647 is about 770.6660044283. Note that the first 3 decimals are identical.

It can be divided in two parts, 457 and 718647, that added together give a square (719104 = 848²).

The spelling of 457718647 in words is "four hundred fifty-seven million, seven hundred eighteen thousand, six hundred forty-seven".