648242947 has 24 divisors (see below), whose sum is σ = 734397840. Its totient is φ = 567216000.

The previous prime is 648242927. The next prime is 648242957. The reversal of 648242947 is 749242846.

It is not a de Polignac number, because 648242947 - 2²³ = 639854339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 648242897 and 648242906.

It is not an unprimeable number, because it can be changed into a prime (648242927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5947129 + ... + 5947237.

It is an arithmetic number, because the mean of its divisors is an integer number (30599910).

Almost surely, 2^648242947 is an apocalyptic number.

648242947 is a deficient number, since it is larger than the sum of its proper divisors (86154893).

648242947 is a wasteful number, since it uses less digits than its factorization.

648242947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375 (or 274 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The square root of 648242947 is about 25460.6156052834. The cubic root of 648242947 is about 865.4578737975.

The spelling of 648242947 in words is "six hundred forty-eight million, two hundred forty-two thousand, nine hundred forty-seven".