648514389 has 8 divisors (see below), whose sum is σ = 892579072. Its totient is φ = 418396320.

The previous prime is 648514381. The next prime is 648514421. The reversal of 648514389 is 983415846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 648514389 - 2³ = 648514381 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 (648514381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3486544 + ... + 3486729.

It is an arithmetic number, because the mean of its divisors is an integer number (111572384).

Almost surely, 2^648514389 is an apocalyptic number.

It is an amenable number.

648514389 is a deficient number, since it is larger than the sum of its proper divisors (244064683).

648514389 is a wasteful number, since it uses less digits than its factorization.

648514389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6973307.

The product of its digits is 829440, while the sum is 48.

The square root of 648514389 is about 25465.9456726036. The cubic root of 648514389 is about 865.5786561034.

The spelling of 648514389 in words is "six hundred forty-eight million, five hundred fourteen thousand, three hundred eighty-nine".