648311 has 4 divisors (see below), whose sum is σ = 663432. Its totient is φ = 633192.

The previous prime is 648293. The next prime is 648317. The reversal of 648311 is 113846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113846 = 2 ⋅56923.

It is a cyclic number.

It is not a de Polignac number, because 648311 - 2¹⁴ = 631927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7496 + ... + 7581.

It is an arithmetic number, because the mean of its divisors is an integer number (165858).

2⁶⁴⁸³¹¹ is an apocalyptic number.

648311 is a deficient number, since it is larger than the sum of its proper divisors (15121).

648311 is a wasteful number, since it uses less digits than its factorization.

648311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15120.

The product of its digits is 576, while the sum is 23.

The square root of 648311 is about 805.1776201560. The cubic root of 648311 is about 86.5488158196.

It can be divided in two parts, 648 and 311, that added together give a palindrome (959).

The spelling of 648311 in words is "six hundred forty-eight thousand, three hundred eleven".