646872083 has 16 divisors (see below), whose sum is σ = 804668256. Its totient is φ = 510896640.

The previous prime is 646872067. The next prime is 646872089. The reversal of 646872083 is 380278646.

646872083 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 646872083 - 2⁴ = 646872067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646872089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130616 + ... + 135477.

It is an arithmetic number, because the mean of its divisors is an integer number (50291766).

Almost surely, 2^646872083 is an apocalyptic number.

646872083 is a deficient number, since it is larger than the sum of its proper divisors (157796173).

646872083 is a wasteful number, since it uses less digits than its factorization.

646872083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266134.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 646872083 is about 25433.6800915636. The cubic root of 646872083 is about 864.8473710232.

The spelling of 646872083 in words is "six hundred forty-six million, eight hundred seventy-two thousand, eighty-three".