648601403 has 8 divisors (see below), whose sum is σ = 683374848. Its totient is φ = 614375784.

The previous prime is 648601301. The next prime is 648601409. The reversal of 648601403 is 304106846.

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 648601403 - 2²⁰ = 647552827 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648601403.

It is not an unprimeable number, because it can be changed into a prime (648601409) 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, 134525 + ... + 139262.

It is an arithmetic number, because the mean of its divisors is an integer number (85421856).

Almost surely, 2^648601403 is an apocalyptic number.

648601403 is a deficient number, since it is larger than the sum of its proper divisors (34773445).

648601403 is a wasteful number, since it uses less digits than its factorization.

648601403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273913.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 648601403 is about 25467.6540537208. The cubic root of 648601403 is about 865.6173671915.

The spelling of 648601403 in words is "six hundred forty-eight million, six hundred one thousand, four hundred three".