646097 has 4 divisors (see below), whose sum is σ = 652596. Its totient is φ = 639600.

The previous prime is 646073. The next prime is 646099. The reversal of 646097 is 790646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790646 = 2 ⋅395323.

It can be written as a sum of positive squares in 2 ways, for example, as 287296 + 358801 = 536^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 646097 - 2¹⁶ = 580561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3098 + ... + 3299.

It is an arithmetic number, because the mean of its divisors is an integer number (163149).

2⁶⁴⁶⁰⁹⁷ is an apocalyptic number.

It is an amenable number.

646097 is a deficient number, since it is larger than the sum of its proper divisors (6499).

646097 is a wasteful number, since it uses less digits than its factorization.

646097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6498.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 646097 is about 803.8015924344. The cubic root of 646097 is about 86.4501812542.

The spelling of 646097 in words is "six hundred forty-six thousand, ninety-seven".