648657227 has 4 divisors (see below), whose sum is σ = 648717000. Its totient is φ = 648597456.

The previous prime is 648657223. The next prime is 648657257. The reversal of 648657227 is 722756846.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 648657227 - 2² = 648657223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648657223) 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, 8513 + ... + 37010.

It is an arithmetic number, because the mean of its divisors is an integer number (162179250).

Almost surely, 2^648657227 is an apocalyptic number.

648657227 is a deficient number, since it is larger than the sum of its proper divisors (59773).

648657227 is a wasteful number, since it uses less digits than its factorization.

648657227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59772.

The product of its digits is 1128960, while the sum is 47.

The square root of 648657227 is about 25468.7500085890. The cubic root of 648657227 is about 865.6422005418.

The spelling of 648657227 in words is "six hundred forty-eight million, six hundred fifty-seven thousand, two hundred twenty-seven".