648430459 has 4 divisors (see below), whose sum is σ = 670790160. Its totient is φ = 626070760.

The previous prime is 648430451. The next prime is 648430493. The reversal of 648430459 is 954034846.

It is a happy number.

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 648430459 - 2³ = 648430451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648430451) 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, 11179807 + ... + 11179864.

It is an arithmetic number, because the mean of its divisors is an integer number (167697540).

Almost surely, 2^648430459 is an apocalyptic number.

648430459 is a deficient number, since it is larger than the sum of its proper divisors (22359701).

648430459 is a wasteful number, since it uses less digits than its factorization.

648430459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22359700.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 648430459 is about 25464.2977323153. The cubic root of 648430459 is about 865.5413137550.

The spelling of 648430459 in words is "six hundred forty-eight million, four hundred thirty thousand, four hundred fifty-nine".