64530643 has 2 divisors, whose sum is σ = 64530644. Its totient is φ = 64530642.

The previous prime is 64530629. The next prime is 64530647. The reversal of 64530643 is 34603546.

64530643 is nontrivially palindromic in base 16.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64530643 - 2¹⁷ = 64399571 is a prime.

It is not a weakly prime, because it can be changed into another prime (64530647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32265321 + 32265322.

It is an arithmetic number, because the mean of its divisors is an integer number (32265322).

Almost surely, 2^64530643 is an apocalyptic number.

64530643 is a deficient number, since it is larger than the sum of its proper divisors (1).

64530643 is an equidigital number, since it uses as much as digits as its factorization.

64530643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 64530643 is about 8033.0967254229. The cubic root of 64530643 is about 401.1024648863.

The spelling of 64530643 in words is "sixty-four million, five hundred thirty thousand, six hundred forty-three".