653649 has 8 divisors (see below), whose sum is σ = 888192. Its totient is φ = 427440.

The previous prime is 653647. The next prime is 653651. The reversal of 653649 is 946356.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (653647) and next prime (653651).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 653649 - 2¹ = 653647 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653649.

It is not an unprimeable number, because it can be changed into a prime (653641) 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 7 ways as a sum of consecutive naturals, for example, 1897 + ... + 2214.

It is an arithmetic number, because the mean of its divisors is an integer number (111024).

2⁶⁵³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

653649 is a deficient number, since it is larger than the sum of its proper divisors (234543).

653649 is a wasteful number, since it uses less digits than its factorization.

653649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167.

The product of its digits is 19440, while the sum is 33.

The square root of 653649 is about 808.4856213935. The cubic root of 653649 is about 86.7857059149.

The spelling of 653649 in words is "six hundred fifty-three thousand, six hundred forty-nine".