647630445 has 32 divisors (see below), whose sum is σ = 1291898880. Its totient is φ = 269144640.

The previous prime is 647630441. The next prime is 647630449. The reversal of 647630445 is 544036746.

It is a happy number.

647630445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (647630441) and next prime (647630449).

It is not a de Polignac number, because 647630445 - 2² = 647630441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647630441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279205 + ... + 281514.

It is an arithmetic number, because the mean of its divisors is an integer number (40371840).

Almost surely, 2^647630445 is an apocalyptic number.

It is an amenable number.

647630445 is a deficient number, since it is larger than the sum of its proper divisors (644268435).

647630445 is a wasteful number, since it uses less digits than its factorization.

647630445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560745.

The product of its (nonzero) digits is 241920, while the sum is 39.

The square root of 647630445 is about 25448.5843417664. The cubic root of 647630445 is about 865.1852076493.

The spelling of 647630445 in words is "six hundred forty-seven million, six hundred thirty thousand, four hundred forty-five".