643875095 has 8 divisors (see below), whose sum is σ = 773070480. Its totient is φ = 514819840.

The previous prime is 643875079. The next prime is 643875103. The reversal of 643875095 is 590578346.

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

It is not a de Polignac number, because 643875095 - 2⁴ = 643875079 is a prime.

It is a super-2 number, since 2×643875095² = 829150275922518050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24641 + ... + 43530.

It is an arithmetic number, because the mean of its divisors is an integer number (96633810).

Almost surely, 2^643875095 is an apocalyptic number.

643875095 is a deficient number, since it is larger than the sum of its proper divisors (129195385).

643875095 is a wasteful number, since it uses less digits than its factorization.

643875095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70065.

The product of its (nonzero) digits is 907200, while the sum is 47.

The square root of 643875095 is about 25374.6939883026. The cubic root of 643875095 is about 863.5096771934.

The spelling of 643875095 in words is "six hundred forty-three million, eight hundred seventy-five thousand, ninety-five".