649323 has 8 divisors (see below), whose sum is σ = 962000. Its totient is φ = 432864.

The previous prime is 649321. The next prime is 649361. The reversal of 649323 is 323946.

It is not a de Polignac number, because 649323 - 2¹ = 649321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 24049 = 649323 / (6 + 4 + 9 + 3 + 2 + 3).

It is a d-powerful number, because it can be written as 6² + 4⁹ + 3¹¹ + 9² + 2¹⁵ + 3¹¹ .

It is a Duffinian number.

649323 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (649321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11998 + ... + 12051.

It is an arithmetic number, because the mean of its divisors is an integer number (120250).

2⁶⁴⁹³²³ is an apocalyptic number.

649323 is a deficient number, since it is larger than the sum of its proper divisors (312677).

649323 is a wasteful number, since it uses less digits than its factorization.

649323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24058 (or 24052 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 649323 is about 805.8058078718. The cubic root of 649323 is about 86.5938260421.

The spelling of 649323 in words is "six hundred forty-nine thousand, three hundred twenty-three".