649319 has 4 divisors (see below), whose sum is σ = 708360. Its totient is φ = 590280.

The previous prime is 649307. The next prime is 649321. The reversal of 649319 is 913946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 649319 - 2⁸ = 649063 is a prime.

It is a super-2 number, since 2×649319² = 843230327522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649379) 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 3 ways as a sum of consecutive naturals, for example, 29504 + ... + 29525.

It is an arithmetic number, because the mean of its divisors is an integer number (177090).

2⁶⁴⁹³¹⁹ is an apocalyptic number.

649319 is a deficient number, since it is larger than the sum of its proper divisors (59041).

649319 is a wasteful number, since it uses less digits than its factorization.

649319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59040.

The product of its digits is 5832, while the sum is 32.

The square root of 649319 is about 805.8033258805. The cubic root of 649319 is about 86.5936482282.

The spelling of 649319 in words is "six hundred forty-nine thousand, three hundred nineteen".