649459 has 4 divisors (see below), whose sum is σ = 657760. Its totient is φ = 641160.

The previous prime is 649457. The next prime is 649469. The reversal of 649459 is 954946.

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 649459 - 2¹ = 649457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649457) 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, 4032 + ... + 4189.

It is an arithmetic number, because the mean of its divisors is an integer number (164440).

2⁶⁴⁹⁴⁵⁹ is an apocalyptic number.

649459 is a deficient number, since it is larger than the sum of its proper divisors (8301).

649459 is an equidigital number, since it uses as much as digits as its factorization.

649459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8300.

The product of its digits is 38880, while the sum is 37.

The square root of 649459 is about 805.8901910310. The cubic root of 649459 is about 86.5998712811.

The spelling of 649459 in words is "six hundred forty-nine thousand, four hundred fifty-nine".