64017643 has 2 divisors, whose sum is σ = 64017644. Its totient is φ = 64017642.

The previous prime is 64017607. The next prime is 64017649. The reversal of 64017643 is 34671046.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64017643 is a prime.

It is not a weakly prime, because it can be changed into another prime (64017649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32008821 + 32008822.

It is an arithmetic number, because the mean of its divisors is an integer number (32008822).

Almost surely, 2^64017643 is an apocalyptic number.

64017643 is a deficient number, since it is larger than the sum of its proper divisors (1).

64017643 is an equidigital number, since it uses as much as digits as its factorization.

64017643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 64017643 is about 8001.1026115155. The cubic root of 64017643 is about 400.0367528730.

Adding to 64017643 its reverse (34671046), we get a palindrome (98688689).

The spelling of 64017643 in words is "sixty-four million, seventeen thousand, six hundred forty-three".