648537873 has 4 divisors (see below), whose sum is σ = 864717168. Its totient is φ = 432358580.

The previous prime is 648537871. The next prime is 648537881. The reversal of 648537873 is 378735846.

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.

It is a cyclic number.

It is not a de Polignac number, because 648537873 - 2¹ = 648537871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648537871) 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, 108089643 + ... + 108089648.

It is an arithmetic number, because the mean of its divisors is an integer number (216179292).

Almost surely, 2^648537873 is an apocalyptic number.

It is an amenable number.

648537873 is a deficient number, since it is larger than the sum of its proper divisors (216179295).

648537873 is a wasteful number, since it uses less digits than its factorization.

648537873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216179294.

The product of its digits is 3386880, while the sum is 51.

The square root of 648537873 is about 25466.4067547819. The cubic root of 648537873 is about 865.5891040874.

The spelling of 648537873 in words is "six hundred forty-eight million, five hundred thirty-seven thousand, eight hundred seventy-three".