64533863 has 2 divisors, whose sum is σ = 64533864. Its totient is φ = 64533862.

The previous prime is 64533839. The next prime is 64533869. The reversal of 64533863 is 36833546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64533863 - 2¹⁸ = 64271719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64533869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32266931 + 32266932.

It is an arithmetic number, because the mean of its divisors is an integer number (32266932).

Almost surely, 2^64533863 is an apocalyptic number.

64533863 is a deficient number, since it is larger than the sum of its proper divisors (1).

64533863 is an equidigital number, since it uses as much as digits as its factorization.

64533863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 38.

The square root of 64533863 is about 8033.2971437636. The cubic root of 64533863 is about 401.1091362825.

The spelling of 64533863 in words is "sixty-four million, five hundred thirty-three thousand, eight hundred sixty-three".