64304621 has 2 divisors, whose sum is σ = 64304622. Its totient is φ = 64304620.

The previous prime is 64304609. The next prime is 64304663. The reversal of 64304621 is 12640346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63027721 + 1276900 = 7939^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 64304621 - 2¹⁸ = 64042477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64304671) 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, 32152310 + 32152311.

It is an arithmetic number, because the mean of its divisors is an integer number (32152311).

Almost surely, 2^64304621 is an apocalyptic number.

It is an amenable number.

64304621 is a deficient number, since it is larger than the sum of its proper divisors (1).

64304621 is an equidigital number, since it uses as much as digits as its factorization.

64304621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 64304621 is about 8019.0162114813. The cubic root of 64304621 is about 400.6336228585.

Adding to 64304621 its reverse (12640346), we get a palindrome (76944967).

The spelling of 64304621 in words is "sixty-four million, three hundred four thousand, six hundred twenty-one".