643342467 has 8 divisors (see below), whose sum is σ = 887369040. Its totient is φ = 414105440.

The previous prime is 643342459. The next prime is 643342471. The reversal of 643342467 is 764243346.

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 643342467 - 2³ = 643342459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (643342477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3697284 + ... + 3697457.

It is an arithmetic number, because the mean of its divisors is an integer number (110921130).

Almost surely, 2^643342467 is an apocalyptic number.

643342467 is a deficient number, since it is larger than the sum of its proper divisors (244026573).

643342467 is a wasteful number, since it uses less digits than its factorization.

643342467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7394773.

The product of its digits is 290304, while the sum is 39.

The square root of 643342467 is about 25364.1965573523. The cubic root of 643342467 is about 863.2715066147.

The spelling of 643342467 in words is "six hundred forty-three million, three hundred forty-two thousand, four hundred sixty-seven".