643151063 has 2 divisors, whose sum is σ = 643151064. Its totient is φ = 643151062.

The previous prime is 643151029. The next prime is 643151071. The reversal of 643151063 is 360151346.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643151063 - 2¹² = 643146967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643151263) 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, 321575531 + 321575532.

It is an arithmetic number, because the mean of its divisors is an integer number (321575532).

Almost surely, 2^643151063 is an apocalyptic number.

643151063 is a deficient number, since it is larger than the sum of its proper divisors (1).

643151063 is an equidigital number, since it uses as much as digits as its factorization.

643151063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 643151063 is about 25360.4231628733. The cubic root of 643151063 is about 863.1858860641.

The spelling of 643151063 in words is "six hundred forty-three million, one hundred fifty-one thousand, sixty-three".