648244423 has 4 divisors (see below), whose sum is σ = 648374080. Its totient is φ = 648114768.

The previous prime is 648244417. The next prime is 648244427. The reversal of 648244423 is 324442846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648244423 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 (648244427) 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, 57015 + ... + 67432.

It is an arithmetic number, because the mean of its divisors is an integer number (162093520).

Almost surely, 2^648244423 is an apocalyptic number.

648244423 is a deficient number, since it is larger than the sum of its proper divisors (129657).

648244423 is a wasteful number, since it uses less digits than its factorization.

648244423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129656.

The product of its digits is 147456, while the sum is 37.

The square root of 648244423 is about 25460.6445912117. The cubic root of 648244423 is about 865.4585306576.

It can be divided in two parts, 6482 and 44423, that added together give a palindrome (50905).

The spelling of 648244423 in words is "six hundred forty-eight million, two hundred forty-four thousand, four hundred twenty-three".