643214327 has 12 divisors (see below), whose sum is σ = 768453480. Its totient is φ = 536424336.

The previous prime is 643214321. The next prime is 643214333. The reversal of 643214327 is 723412346.

It is an interprime number because it is at equal distance from previous prime (643214321) and next prime (643214333).

It is not a de Polignac number, because 643214327 - 2¹⁰ = 643213303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643214293 and 643214302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643214321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 175577 + ... + 179202.

It is an arithmetic number, because the mean of its divisors is an integer number (64037790).

Almost surely, 2^643214327 is an apocalyptic number.

643214327 is a deficient number, since it is larger than the sum of its proper divisors (125239153).

643214327 is a wasteful number, since it uses less digits than its factorization.

643214327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354830 (or 354823 counting only the distinct ones).

The product of its digits is 24192, while the sum is 32.

The square root of 643214327 is about 25361.6704300013. The cubic root of 643214327 is about 863.2141877621.

The spelling of 643214327 in words is "six hundred forty-three million, two hundred fourteen thousand, three hundred twenty-seven".