649873 has 8 divisors (see below), whose sum is σ = 747648. Its totient is φ = 553344.

The previous prime is 649871. The next prime is 649877. The reversal of 649873 is 378946.

649873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 649873 - 2¹ = 649871 is a prime.

It is a super-2 number, since 2×649873² = 844669832258, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6 + 4⁴ + 8³ + 9 + 7⁶ + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649871) 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, 1665 + ... + 2017.

It is an arithmetic number, because the mean of its divisors is an integer number (93456).

2⁶⁴⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

649873 is a deficient number, since it is larger than the sum of its proper divisors (97775).

649873 is a wasteful number, since it uses less digits than its factorization.

649873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623.

The product of its digits is 36288, while the sum is 37.

The square root of 649873 is about 806.1470089258. The cubic root of 649873 is about 86.6182685068.

The spelling of 649873 in words is "six hundred forty-nine thousand, eight hundred seventy-three".