646373 has 8 divisors (see below), whose sum is σ = 795648. Its totient is φ = 511344.

The previous prime is 646339. The next prime is 646379. The reversal of 646373 is 373646.

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

It is a cyclic number.

It is not a de Polignac number, because 646373 - 2⁶ = 646309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3461 + ... + 3642.

It is an arithmetic number, because the mean of its divisors is an integer number (99456).

2⁶⁴⁶³⁷³ is an apocalyptic number.

It is an amenable number.

646373 is a deficient number, since it is larger than the sum of its proper divisors (149275).

646373 is a wasteful number, since it uses less digits than its factorization.

646373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7123.

The product of its digits is 9072, while the sum is 29.

The square root of 646373 is about 803.9732582617. The cubic root of 646373 is about 86.4624894439.

The spelling of 646373 in words is "six hundred forty-six thousand, three hundred seventy-three".