6924639 has 4 divisors (see below), whose sum is σ = 9232856. Its totient is φ = 4616424.

The previous prime is 6924629. The next prime is 6924641. The reversal of 6924639 is 9364296.

It is a happy number.

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

It is not a de Polignac number, because 6924639 - 2¹⁶ = 6859103 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6924597 and 6924606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6924629) 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, 1154104 + ... + 1154109.

It is an arithmetic number, because the mean of its divisors is an integer number (2308214).

Almost surely, 2^6924639 is an apocalyptic number.

6924639 is a deficient number, since it is larger than the sum of its proper divisors (2308217).

6924639 is a wasteful number, since it uses less digits than its factorization.

6924639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308216.

The product of its digits is 69984, while the sum is 39.

The square root of 6924639 is about 2631.4708814653. The cubic root of 6924639 is about 190.6041617999.

The spelling of 6924639 in words is "six million, nine hundred twenty-four thousand, six hundred thirty-nine".