43664063 has 2 divisors, whose sum is σ = 43664064. Its totient is φ = 43664062.

The previous prime is 43664009. The next prime is 43664099. The reversal of 43664063 is 36046634.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43664063 - 2⁶ = 43663999 is a prime.

It is a Sophie Germain prime.

It is equal to p_2642279 and since 43664063 and 2642279 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43664263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21832031 + 21832032.

It is an arithmetic number, because the mean of its divisors is an integer number (21832032).

Almost surely, 2^43664063 is an apocalyptic number.

43664063 is a deficient number, since it is larger than the sum of its proper divisors (1).

43664063 is an equidigital number, since it uses as much as digits as its factorization.

43664063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 43664063 is about 6607.8788578484. The cubic root of 43664063 is about 352.1340715817.

The spelling of 43664063 in words is "forty-three million, six hundred sixty-four thousand, sixty-three".