648869271 has 4 divisors (see below), whose sum is σ = 865159032. Its totient is φ = 432579512.

The previous prime is 648869251. The next prime is 648869297. The reversal of 648869271 is 172968846.

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 648869271 - 2¹⁰ = 648868247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648869251) 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, 108144876 + ... + 108144881.

It is an arithmetic number, because the mean of its divisors is an integer number (216289758).

Almost surely, 2^648869271 is an apocalyptic number.

648869271 is a deficient number, since it is larger than the sum of its proper divisors (216289761).

648869271 is a wasteful number, since it uses less digits than its factorization.

648869271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216289760.

The product of its digits is 1161216, while the sum is 51.

The square root of 648869271 is about 25472.9124954333. The cubic root of 648869271 is about 865.7365154998.

The spelling of 648869271 in words is "six hundred forty-eight million, eight hundred sixty-nine thousand, two hundred seventy-one".