646352047 has 8 divisors (see below), whose sum is σ = 709189200. Its totient is φ = 584194560.

The previous prime is 646352023. The next prime is 646352059. The reversal of 646352047 is 740253646.

646352047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 646352047 - 2¹⁹ = 645827759 is a prime.

It is a super-2 number, since 2×646352047² = 835541937322180418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646351997 and 646352015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646352347) 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, 167922 + ... + 171727.

It is an arithmetic number, because the mean of its divisors is an integer number (88648650).

Almost surely, 2^646352047 is an apocalyptic number.

646352047 is a deficient number, since it is larger than the sum of its proper divisors (62837153).

646352047 is a wasteful number, since it uses less digits than its factorization.

646352047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339833.

The product of its (nonzero) digits is 120960, while the sum is 37.

The square root of 646352047 is about 25423.4546629682. The cubic root of 646352047 is about 864.6155517010.

The spelling of 646352047 in words is "six hundred forty-six million, three hundred fifty-two thousand, forty-seven".