6940239 has 4 divisors (see below), whose sum is σ = 9253656. Its totient is φ = 4626824.

The previous prime is 6940223. The next prime is 6940261. The reversal of 6940239 is 9320496.

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

It is a cyclic number.

It is not a de Polignac number, because 6940239 - 2⁴ = 6940223 is a prime.

It is a d-powerful number, because it can be written as 6² + 9 + 4⁵ + 0 + 2²¹ + 3¹⁴ + 9⁵ .

It is a D-number.

6940239 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6940279) 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, 1156704 + ... + 1156709.

It is an arithmetic number, because the mean of its divisors is an integer number (2313414).

Almost surely, 2^6940239 is an apocalyptic number.

6940239 is a deficient number, since it is larger than the sum of its proper divisors (2313417).

6940239 is a wasteful number, since it uses less digits than its factorization.

6940239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313416.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 6940239 is about 2634.4333356530. The cubic root of 6940239 is about 190.7471870583.

The spelling of 6940239 in words is "six million, nine hundred forty thousand, two hundred thirty-nine".