646732093 has 4 divisors (see below), whose sum is σ = 739122400. Its totient is φ = 554341788.

The previous prime is 646732081. The next prime is 646732123. The reversal of 646732093 is 390237646.

646732093 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 390237646 = 2 ⋅195118823.

It is not a de Polignac number, because 646732093 - 2⁵ = 646732061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646732063) 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, 46195143 + ... + 46195156.

It is an arithmetic number, because the mean of its divisors is an integer number (184780600).

Almost surely, 2^646732093 is an apocalyptic number.

It is an amenable number.

646732093 is a deficient number, since it is larger than the sum of its proper divisors (92390307).

646732093 is an equidigital number, since it uses as much as digits as its factorization.

646732093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92390306.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 646732093 is about 25430.9278831898. The cubic root of 646732093 is about 864.7849791318.

It can be divided in two parts, 64673 and 2093, that added together give a palindrome (66766).

The spelling of 646732093 in words is "six hundred forty-six million, seven hundred thirty-two thousand, ninety-three".