647406613 has 16 divisors (see below), whose sum is σ = 755184384. Its totient is φ = 543553920.

The previous prime is 647406601. The next prime is 647406619. The reversal of 647406613 is 316604746.

It is not a de Polignac number, because 647406613 - 2⁹ = 647406101 is a prime.

It is a super-2 number, since 2×647406613² = 838270645112263538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647406619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73881 + ... + 82177.

It is an arithmetic number, because the mean of its divisors is an integer number (47199024).

Almost surely, 2^647406613 is an apocalyptic number.

It is an amenable number.

647406613 is a deficient number, since it is larger than the sum of its proper divisors (107777771).

647406613 is a wasteful number, since it uses less digits than its factorization.

647406613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8532.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 647406613 is about 25444.1862318291. The cubic root of 647406613 is about 865.0855219662.

The spelling of 647406613 in words is "six hundred forty-seven million, four hundred six thousand, six hundred thirteen".