648084071 has 4 divisors (see below), whose sum is σ = 648136152. Its totient is φ = 648031992.

The previous prime is 648084037. The next prime is 648084077. The reversal of 648084071 is 170480846.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648084071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648084077) 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, 4805 + ... + 36321.

It is an arithmetic number, because the mean of its divisors is an integer number (162034038).

Almost surely, 2^648084071 is an apocalyptic number.

648084071 is a deficient number, since it is larger than the sum of its proper divisors (52081).

648084071 is a wasteful number, since it uses less digits than its factorization.

648084071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52080.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 648084071 is about 25457.4953795537. The cubic root of 648084071 is about 865.3871638265.

The spelling of 648084071 in words is "six hundred forty-eight million, eighty-four thousand, seventy-one".