643701117 has 8 divisors (see below), whose sum is σ = 858413824. Its totient is φ = 429061248.

The previous prime is 643701083. The next prime is 643701131. The reversal of 643701117 is 711107346.

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

It is not a de Polignac number, because 643701117 - 2⁶ = 643701053 is a prime.

It is a super-2 number, since 2×643701117² = 828702256054095378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643701137) 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, 7668 + ... + 36690.

It is an arithmetic number, because the mean of its divisors is an integer number (107301728).

Almost surely, 2^643701117 is an apocalyptic number.

It is an amenable number.

643701117 is a deficient number, since it is larger than the sum of its proper divisors (214712707).

643701117 is a wasteful number, since it uses less digits than its factorization.

643701117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36419.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 643701117 is about 25371.2655774205. The cubic root of 643701117 is about 863.4318954306.

The spelling of 643701117 in words is "six hundred forty-three million, seven hundred one thousand, one hundred seventeen".