648573049 has 4 divisors (see below), whose sum is σ = 648645520. Its totient is φ = 648500580.

The previous prime is 648573047. The next prime is 648573059. The reversal of 648573049 is 940375846.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 940375846 = 2 ⋅470187923.

It is a cyclic number.

It is not a de Polignac number, because 648573049 - 2¹ = 648573047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648573047) 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, 20547 + ... + 41464.

It is an arithmetic number, because the mean of its divisors is an integer number (162161380).

Almost surely, 2^648573049 is an apocalyptic number.

It is an amenable number.

648573049 is a deficient number, since it is larger than the sum of its proper divisors (72471).

648573049 is a wasteful number, since it uses less digits than its factorization.

648573049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72470.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 648573049 is about 25467.0973807382. The cubic root of 648573049 is about 865.6047533466.

The spelling of 648573049 in words is "six hundred forty-eight million, five hundred seventy-three thousand, forty-nine".