647642135 has 32 divisors (see below), whose sum is σ = 911623680. Its totient is φ = 432448128.

The previous prime is 647642101. The next prime is 647642137. The reversal of 647642135 is 531246746.

It is a happy number.

647642135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 647642135 - 2¹² = 647638039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647642137) 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, 982436 + ... + 983094.

It is an arithmetic number, because the mean of its divisors is an integer number (28488240).

Almost surely, 2^647642135 is an apocalyptic number.

647642135 is a deficient number, since it is larger than the sum of its proper divisors (263981545).

647642135 is a wasteful number, since it uses less digits than its factorization.

647642135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367.

The product of its digits is 120960, while the sum is 38.

The square root of 647642135 is about 25448.8140195177. The cubic root of 647642135 is about 865.1904132695.

The spelling of 647642135 in words is "six hundred forty-seven million, six hundred forty-two thousand, one hundred thirty-five".