648537 has 4 divisors (see below), whose sum is σ = 864720. Its totient is φ = 432356.

The previous prime is 648509. The next prime is 648563. The reversal of 648537 is 735846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 648537 - 2¹⁴ = 632153 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 648498 and 648507.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 648537.

It is not an unprimeable number, because it can be changed into a prime (648437) 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, 108087 + ... + 108092.

It is an arithmetic number, because the mean of its divisors is an integer number (216180).

2⁶⁴⁸⁵³⁷ is an apocalyptic number.

It is an amenable number.

648537 is a deficient number, since it is larger than the sum of its proper divisors (216183).

648537 is a wasteful number, since it uses less digits than its factorization.

648537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216182.

The product of its digits is 20160, while the sum is 33.

The square root of 648537 is about 805.3179496323. The cubic root of 648537 is about 86.5588715696.

The spelling of 648537 in words is "six hundred forty-eight thousand, five hundred thirty-seven".