643358131 has 8 divisors (see below), whose sum is σ = 708960560. Its totient is φ = 580057632.

The previous prime is 643358129. The next prime is 643358141. The reversal of 643358131 is 131853346.

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 643358131 - 2¹ = 643358129 is a prime.

It is a super-2 number, since 2×643358131² = 827819369447626322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643358141) 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, 574896 + ... + 576013.

It is an arithmetic number, because the mean of its divisors is an integer number (88620070).

Almost surely, 2^643358131 is an apocalyptic number.

643358131 is a deficient number, since it is larger than the sum of its proper divisors (65602429).

643358131 is a wasteful number, since it uses less digits than its factorization.

643358131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150965.

The product of its digits is 25920, while the sum is 34.

The square root of 643358131 is about 25364.5053371833. The cubic root of 643358131 is about 863.2785128235.

The spelling of 643358131 in words is "six hundred forty-three million, three hundred fifty-eight thousand, one hundred thirty-one".