643354675 has 12 divisors (see below), whose sum is σ = 798086320. Its totient is φ = 514473120.

The previous prime is 643354639. The next prime is 643354711. The reversal of 643354675 is 576453346.

It is an interprime number because it is at equal distance from previous prime (643354639) and next prime (643354711).

It is not a de Polignac number, because 643354675 - 2¹⁹ = 642830387 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92986 + ... + 99664.

Almost surely, 2^643354675 is an apocalyptic number.

643354675 is a deficient number, since it is larger than the sum of its proper divisors (154731645).

643354675 is a wasteful number, since it uses less digits than its factorization.

643354675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10542 (or 10537 counting only the distinct ones).

The product of its digits is 907200, while the sum is 43.

The square root of 643354675 is about 25364.4372103936. The cubic root of 643354675 is about 863.2769670303.

The spelling of 643354675 in words is "six hundred forty-three million, three hundred fifty-four thousand, six hundred seventy-five".