603649 has 4 divisors (see below), whose sum is σ = 635440. Its totient is φ = 571860.

The previous prime is 603641. The next prime is 603667. The reversal of 603649 is 946306.

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 603649 - 2³ = 603641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (603641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15867 + ... + 15904.

It is an arithmetic number, because the mean of its divisors is an integer number (158860).

2⁶⁰³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

603649 is a deficient number, since it is larger than the sum of its proper divisors (31791).

603649 is a wasteful number, since it uses less digits than its factorization.

603649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31790.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 603649 is about 776.9485182430. The cubic root of 603649 is about 84.5139036212.

The spelling of 603649 in words is "six hundred three thousand, six hundred forty-nine".