643097 has 16 divisors (see below), whose sum is σ = 817152. Its totient is φ = 492480.

The previous prime is 643087. The next prime is 643099. The reversal of 643097 is 790346.

It is a cyclic number.

It is not a de Polignac number, because 643097 - 2⁴ = 643081 is a prime.

It is a nialpdrome in base 15.

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 15 ways as a sum of consecutive naturals, for example, 3272 + ... + 3462.

It is an arithmetic number, because the mean of its divisors is an integer number (51072).

2⁶⁴³⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

643097 is a deficient number, since it is larger than the sum of its proper divisors (174055).

643097 is a wasteful number, since it uses less digits than its factorization.

643097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 643097 is about 801.9332889960. The cubic root of 643097 is about 86.3161699042.

The spelling of 643097 in words is "six hundred forty-three thousand, ninety-seven".