648872403 has 4 divisors (see below), whose sum is σ = 865163208. Its totient is φ = 432581600.

The previous prime is 648872381. The next prime is 648872407. The reversal of 648872403 is 304278846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 648872403 - 2⁶ = 648872339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648872407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108145398 + ... + 108145403.

It is an arithmetic number, because the mean of its divisors is an integer number (216290802).

Almost surely, 2^648872403 is an apocalyptic number.

648872403 is a deficient number, since it is larger than the sum of its proper divisors (216290805).

648872403 is a wasteful number, since it uses less digits than its factorization.

648872403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216290804.

The product of its (nonzero) digits is 258048, while the sum is 42.

The square root of 648872403 is about 25472.9739724281. The cubic root of 648872403 is about 865.7379084267.

The spelling of 648872403 in words is "six hundred forty-eight million, eight hundred seventy-two thousand, four hundred three".