64247473 has 2 divisors, whose sum is σ = 64247474. Its totient is φ = 64247472.

The previous prime is 64247423. The next prime is 64247479. The reversal of 64247473 is 37474246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64112049 + 135424 = 8007^2 + 368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64247473 is a prime.

It is not a weakly prime, because it can be changed into another prime (64247479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32123736 + 32123737.

It is an arithmetic number, because the mean of its divisors is an integer number (32123737).

Almost surely, 2^64247473 is an apocalyptic number.

It is an amenable number.

64247473 is a deficient number, since it is larger than the sum of its proper divisors (1).

64247473 is an equidigital number, since it uses as much as digits as its factorization.

64247473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 37.

The square root of 64247473 is about 8015.4521394616. The cubic root of 64247473 is about 400.5149056460.

The spelling of 64247473 in words is "sixty-four million, two hundred forty-seven thousand, four hundred seventy-three".