647643201 has 8 divisors (see below), whose sum is σ = 868695744. Its totient is φ = 429176400.

The previous prime is 647643193. The next prime is 647643211. The reversal of 647643201 is 102346746.

It is a happy number.

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

It is not a de Polignac number, because 647643201 - 2³ = 647643193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647643211) 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, 645850 + ... + 646851.

It is an arithmetic number, because the mean of its divisors is an integer number (108586968).

Almost surely, 2^647643201 is an apocalyptic number.

It is an amenable number.

647643201 is a deficient number, since it is larger than the sum of its proper divisors (221052543).

647643201 is a wasteful number, since it uses less digits than its factorization.

647643201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292871.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 647643201 is about 25448.8349635106. The cubic root of 647643201 is about 865.1908879619.

Adding to 647643201 its reverse (102346746), we get a palindrome (749989947).

The spelling of 647643201 in words is "six hundred forty-seven million, six hundred forty-three thousand, two hundred one".