649488443 has 4 divisors (see below), whose sum is σ = 649960128. Its totient is φ = 649016760.

The previous prime is 649488431. The next prime is 649488473. The reversal of 649488443 is 344884946.

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 649488443 - 2²⁶ = 582379579 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649488391 and 649488400.

It is not an unprimeable number, because it can be changed into a prime (649488473) 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, 233771 + ... + 236532.

It is an arithmetic number, because the mean of its divisors is an integer number (162490032).

Almost surely, 2^649488443 is an apocalyptic number.

649488443 is a deficient number, since it is larger than the sum of its proper divisors (471685).

649488443 is a wasteful number, since it uses less digits than its factorization.

649488443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471684.

The product of its digits is 2654208, while the sum is 50.

The square root of 649488443 is about 25485.0631350994. The cubic root of 649488443 is about 866.0117991981.

The spelling of 649488443 in words is "six hundred forty-nine million, four hundred eighty-eight thousand, four hundred forty-three".