647896201 has 4 divisors (see below), whose sum is σ = 648248832. Its totient is φ = 647543572.

The previous prime is 647896157. The next prime is 647896211. The reversal of 647896201 is 102698746.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-647896201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647896211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173545 + ... + 177238.

It is an arithmetic number, because the mean of its divisors is an integer number (162062208).

Almost surely, 2^647896201 is an apocalyptic number.

It is an amenable number.

647896201 is a deficient number, since it is larger than the sum of its proper divisors (352631).

647896201 is a wasteful number, since it uses less digits than its factorization.

647896201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352630.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 647896201 is about 25453.8052361528. The cubic root of 647896201 is about 865.3035347594.

The spelling of 647896201 in words is "six hundred forty-seven million, eight hundred ninety-six thousand, two hundred one".