64717481 has 2 divisors, whose sum is σ = 64717482. Its totient is φ = 64717480.

The previous prime is 64717459. The next prime is 64717517. The reversal of 64717481 is 18471746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 15085456 = 7045^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 64717481 - 2¹⁴ = 64701097 is a prime.

It is a super-2 number, since 2×64717481² = 8376704693970722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64717421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32358740 + 32358741.

It is an arithmetic number, because the mean of its divisors is an integer number (32358741).

Almost surely, 2^64717481 is an apocalyptic number.

It is an amenable number.

64717481 is a deficient number, since it is larger than the sum of its proper divisors (1).

64717481 is an equidigital number, since it uses as much as digits as its factorization.

64717481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 38.

The square root of 64717481 is about 8044.7175836073. The cubic root of 64717481 is about 401.4892009045.

The spelling of 64717481 in words is "sixty-four million, seven hundred seventeen thousand, four hundred eighty-one".