643349327 has 8 divisors (see below), whose sum is σ = 659392272. Its totient is φ = 627323200.

The previous prime is 643349279. The next prime is 643349347. The reversal of 643349327 is 723943346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643349327 - 2⁶ = 643349263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643349347) 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 in 7 ways as a sum of consecutive naturals, for example, 113552 + ... + 119082.

It is an arithmetic number, because the mean of its divisors is an integer number (82424034).

Almost surely, 2^643349327 is an apocalyptic number.

643349327 is a deficient number, since it is larger than the sum of its proper divisors (16042945).

643349327 is a wasteful number, since it uses less digits than its factorization.

643349327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8409.

The product of its digits is 326592, while the sum is 41.

The square root of 643349327 is about 25364.3317869799. The cubic root of 643349327 is about 863.2745749760.

The spelling of 643349327 in words is "six hundred forty-three million, three hundred forty-nine thousand, three hundred twenty-seven".