64304689 has 2 divisors, whose sum is σ = 64304690. Its totient is φ = 64304688.

The previous prime is 64304677. The next prime is 64304717. The reversal of 64304689 is 98640346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 32400 = 8017^2 + 180^2 .

It is a cyclic number.

It is not a de Polignac number, because 64304689 - 2¹⁹ = 63780401 is a prime.

It is a super-3 number, since 3×64304689³ (a number of 24 digits) contains 333 as substring.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (64304609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32152344 + 32152345.

It is an arithmetic number, because the mean of its divisors is an integer number (32152345).

Almost surely, 2^64304689 is an apocalyptic number.

It is an amenable number.

64304689 is a deficient number, since it is larger than the sum of its proper divisors (1).

64304689 is an equidigital number, since it uses as much as digits as its factorization.

64304689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 64304689 is about 8019.0204514018. The cubic root of 64304689 is about 400.6337640774.

The spelling of 64304689 in words is "sixty-four million, three hundred four thousand, six hundred eighty-nine".