648767123 has 4 divisors (see below), whose sum is σ = 649483320. Its totient is φ = 648050928.

The previous prime is 648767113. The next prime is 648767129. The reversal of 648767123 is 321767846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321767846 = 2 ⋅160883923.

It is a cyclic number.

It is not a de Polignac number, because 648767123 - 2⁶ = 648767059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648767129) 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, 356738 + ... + 358551.

It is an arithmetic number, because the mean of its divisors is an integer number (162370830).

Almost surely, 2^648767123 is an apocalyptic number.

648767123 is a deficient number, since it is larger than the sum of its proper divisors (716197).

648767123 is an equidigital number, since it uses as much as digits as its factorization.

648767123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716196.

The product of its digits is 338688, while the sum is 44.

The square root of 648767123 is about 25470.9073847007. The cubic root of 648767123 is about 865.6910837010.

The spelling of 648767123 in words is "six hundred forty-eight million, seven hundred sixty-seven thousand, one hundred twenty-three".