643096 has 8 divisors (see below), whose sum is σ = 1205820. Its totient is φ = 321544.

The previous prime is 643087. The next prime is 643099. The reversal of 643096 is 690346.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40186 + ... + 40201.

2⁶⁴³⁰⁹⁶ is an apocalyptic number.

It is an amenable number.

643096 is a deficient number, since it is larger than the sum of its proper divisors (562724).

643096 is a wasteful number, since it uses less digits than its factorization.

643096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80393 (or 80389 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 643096 is about 801.9326655025. The cubic root of 643096 is about 86.3161251644.

It can be divided in two parts, 64 and 3096, that added together give a triangular number (3160 = T₇₉).

The spelling of 643096 in words is "six hundred forty-three thousand, ninety-six".