649607 has 4 divisors (see below), whose sum is σ = 742416. Its totient is φ = 556800.

The previous prime is 649577. The next prime is 649613. The reversal of 649607 is 706946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706946 = 2 ⋅353473.

It is a cyclic number.

It is not a de Polignac number, because 649607 - 2¹⁸ = 387463 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649657) 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, 46394 + ... + 46407.

It is an arithmetic number, because the mean of its divisors is an integer number (185604).

2⁶⁴⁹⁶⁰⁷ is an apocalyptic number.

649607 is a deficient number, since it is larger than the sum of its proper divisors (92809).

649607 is an equidigital number, since it uses as much as digits as its factorization.

649607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92808.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 649607 is about 805.9820097248. The cubic root of 649607 is about 86.6064489648.

The spelling of 649607 in words is "six hundred forty-nine thousand, six hundred seven".