648727873 has 4 divisors (see below), whose sum is σ = 653395120. Its totient is φ = 644060628.

The previous prime is 648727867. The next prime is 648727879. The reversal of 648727873 is 378727846.

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 an interprime number because it is at equal distance from previous prime (648727867) and next prime (648727879).

It is a cyclic number.

It is not a de Polignac number, because 648727873 - 2⁵ = 648727841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 648727873.

It is not an unprimeable number, because it can be changed into a prime (648727879) 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, 2333415 + ... + 2333692.

It is an arithmetic number, because the mean of its divisors is an integer number (163348780).

Almost surely, 2^648727873 is an apocalyptic number.

It is an amenable number.

648727873 is a deficient number, since it is larger than the sum of its proper divisors (4667247).

648727873 is a wasteful number, since it uses less digits than its factorization.

648727873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667246.

The product of its digits is 3161088, while the sum is 52.

The square root of 648727873 is about 25470.1368861653. The cubic root of 648727873 is about 865.6736254282.

The spelling of 648727873 in words is "six hundred forty-eight million, seven hundred twenty-seven thousand, eight hundred seventy-three".