648126473 has 4 divisors (see below), whose sum is σ = 648205008. Its totient is φ = 648047940.

The previous prime is 648126467. The next prime is 648126503. The reversal of 648126473 is 374621846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 374621846 = 2 ⋅187310923.

It is a cyclic number.

It is not a de Polignac number, because 648126473 - 2⁸ = 648126217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648126473.

It is not an unprimeable number, because it can be changed into a prime (648126463) 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, 25211 + ... + 43952.

It is an arithmetic number, because the mean of its divisors is an integer number (162051252).

Almost surely, 2^648126473 is an apocalyptic number.

It is an amenable number.

648126473 is a deficient number, since it is larger than the sum of its proper divisors (78535).

648126473 is an equidigital number, since it uses as much as digits as its factorization.

648126473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78534.

The product of its digits is 193536, while the sum is 41.

The square root of 648126473 is about 25458.3281658478. The cubic root of 648126473 is about 865.4060365561.

The spelling of 648126473 in words is "six hundred forty-eight million, one hundred twenty-six thousand, four hundred seventy-three".