648956423 has 2 divisors, whose sum is σ = 648956424. Its totient is φ = 648956422.

The previous prime is 648956393. The next prime is 648956437. The reversal of 648956423 is 324659846.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648956423 is a prime.

It is a super-2 number, since 2×648956423² = 842288877905909858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (648956023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324478211 + 324478212.

It is an arithmetic number, because the mean of its divisors is an integer number (324478212).

Almost surely, 2^648956423 is an apocalyptic number.

648956423 is a deficient number, since it is larger than the sum of its proper divisors (1).

648956423 is an equidigital number, since it uses as much as digits as its factorization.

648956423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 47.

The square root of 648956423 is about 25474.6231179187. The cubic root of 648956423 is about 865.7752738416.

The spelling of 648956423 in words is "six hundred forty-eight million, nine hundred fifty-six thousand, four hundred twenty-three".