648437963 has 4 divisors (see below), whose sum is σ = 648524448. Its totient is φ = 648351480.

The previous prime is 648437939. The next prime is 648437969. The reversal of 648437963 is 369734846.

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 648437963 - 2⁸ = 648437707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648437969) 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, 30803 + ... + 47388.

It is an arithmetic number, because the mean of its divisors is an integer number (162131112).

Almost surely, 2^648437963 is an apocalyptic number.

648437963 is a deficient number, since it is larger than the sum of its proper divisors (86485).

648437963 is an equidigital number, since it uses as much as digits as its factorization.

648437963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86484.

The product of its digits is 2612736, while the sum is 50.

The square root of 648437963 is about 25464.4450754380. The cubic root of 648437963 is about 865.5446525849.

The spelling of 648437963 in words is "six hundred forty-eight million, four hundred thirty-seven thousand, nine hundred sixty-three".