643095 has 24 divisors (see below), whose sum is σ = 1153152. Its totient is φ = 331200.

The previous prime is 643087. The next prime is 643099. The reversal of 643095 is 590346.

It is a happy number.

It is not a de Polignac number, because 643095 - 2³ = 643087 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1165 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (48048).

2⁶⁴³⁰⁹⁵ is an apocalyptic number.

643095 is a deficient number, since it is larger than the sum of its proper divisors (510057).

643095 is a wasteful number, since it uses less digits than its factorization.

643095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 643095 is about 801.9320420085. The cubic root of 643095 is about 86.3160804245.

The spelling of 643095 in words is "six hundred forty-three thousand, ninety-five".