646712127 has 8 divisors (see below), whose sum is σ = 958092080. Its totient is φ = 431141400.

The previous prime is 646712089. The next prime is 646712141. The reversal of 646712127 is 721217646.

646712127 is a `hidden beast` number, since 646 + 7 + 1 + 2 + 1 + 2 + 7 = 666.

646712127 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 646712127 - 2¹⁵ = 646679359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646712091 and 646712100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646712167) 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, 11976124 + ... + 11976177.

It is an arithmetic number, because the mean of its divisors is an integer number (119761510).

Almost surely, 2^646712127 is an apocalyptic number.

646712127 is a deficient number, since it is larger than the sum of its proper divisors (311379953).

646712127 is a wasteful number, since it uses less digits than its factorization.

646712127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23952310 (or 23952304 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 646712127 is about 25430.5353266501. The cubic root of 646712127 is about 864.7760797876.

The spelling of 646712127 in words is "six hundred forty-six million, seven hundred twelve thousand, one hundred twenty-seven".