646000093 has 4 divisors (see below), whose sum is σ = 658188828. Its totient is φ = 633811360.

The previous prime is 646000087. The next prime is 646000099. The reversal of 646000093 is 390000646.

646000093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (646000087) and next prime (646000099).

It can be written as a sum of positive squares in 2 ways, for example, as 593263449 + 52736644 = 24357^2 + 7262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646000093 is a prime.

It is a super-2 number, since 2×646000093² = 834632240312017298, 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 (646000099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6094288 + ... + 6094393.

It is an arithmetic number, because the mean of its divisors is an integer number (164547207).

Almost surely, 2^646000093 is an apocalyptic number.

It is an amenable number.

646000093 is a deficient number, since it is larger than the sum of its proper divisors (12188735).

646000093 is a wasteful number, since it uses less digits than its factorization.

646000093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12188734.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 646000093 is about 25416.5318837956. The cubic root of 646000093 is about 864.4585886581.

The spelling of 646000093 in words is "six hundred forty-six million, ninety-three", and thus it is an aban number.