648305397 has 16 divisors (see below), whose sum is σ = 960940480. Its totient is φ = 431984016.

The previous prime is 648305389. The next prime is 648305401. The reversal of 648305397 is 793503846.

It is not a de Polignac number, because 648305397 - 2³ = 648305389 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 (648305297) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61743 + ... + 71475.

It is an arithmetic number, because the mean of its divisors is an integer number (60058780).

Almost surely, 2^648305397 is an apocalyptic number.

It is an amenable number.

648305397 is a deficient number, since it is larger than the sum of its proper divisors (312635083).

648305397 is a wasteful number, since it uses less digits than its factorization.

648305397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12209 (or 12203 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 648305397 is about 25461.8419797155. The cubic root of 648305397 is about 865.4856648744.

The spelling of 648305397 in words is "six hundred forty-eight million, three hundred five thousand, three hundred ninety-seven".