649173 has 16 divisors (see below), whose sum is σ = 1041920. Its totient is φ = 351216.

The previous prime is 649157. The next prime is 649183. The reversal of 649173 is 371946.

It is a happy number.

It is not a de Polignac number, because 649173 - 2⁴ = 649157 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 649173.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649173.

It is not an unprimeable number, because it can be changed into a prime (649123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415 + ... + 1212.

It is an arithmetic number, because the mean of its divisors is an integer number (65120).

2⁶⁴⁹¹⁷³ is an apocalyptic number.

It is an amenable number.

649173 is a deficient number, since it is larger than the sum of its proper divisors (392747).

649173 is a wasteful number, since it uses less digits than its factorization.

649173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656.

The product of its digits is 4536, while the sum is 30.

The square root of 649173 is about 805.7127279620. The cubic root of 649173 is about 86.5871575201.

The spelling of 649173 in words is "six hundred forty-nine thousand, one hundred seventy-three".