6641923 has 4 divisors (see below), whose sum is σ = 6647680. Its totient is φ = 6636168.

The previous prime is 6641903. The next prime is 6641953. The reversal of 6641923 is 3291466.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3291466 = 2 ⋅1645733.

It is a cyclic number.

It is not a de Polignac number, because 6641923 - 2⁵ = 6641891 is a prime.

It is a super-2 number, since 2×6641923² = 88230282275858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6641903) 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, 483 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (1661920).

Almost surely, 2^6641923 is an apocalyptic number.

6641923 is a deficient number, since it is larger than the sum of its proper divisors (5757).

6641923 is a wasteful number, since it uses less digits than its factorization.

6641923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756.

The product of its digits is 7776, while the sum is 31.

The square root of 6641923 is about 2577.1928526985. The cubic root of 6641923 is about 187.9740702883.

The spelling of 6641923 in words is "six million, six hundred forty-one thousand, nine hundred twenty-three".