648689503 has 8 divisors (see below), whose sum is σ = 808755840. Its totient is φ = 505472280.

The previous prime is 648689479. The next prime is 648689543. The reversal of 648689503 is 305986846.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 648689503 - 2⁵ = 648689471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648689543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4212193 + ... + 4212346.

It is an arithmetic number, because the mean of its divisors is an integer number (101094480).

Almost surely, 2^648689503 is an apocalyptic number.

648689503 is a deficient number, since it is larger than the sum of its proper divisors (160066337).

648689503 is a wasteful number, since it uses less digits than its factorization.

648689503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8424557.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 648689503 is about 25469.3836399706. The cubic root of 648689503 is about 865.6565578958.

The spelling of 648689503 in words is "six hundred forty-eight million, six hundred eighty-nine thousand, five hundred three".