6918939 has 14 divisors (see below), whose sum is σ = 10374756. Its totient is φ = 4612140.

The previous prime is 6918853. The next prime is 6918943. The reversal of 6918939 is 9398196.

It is not a de Polignac number, because 6918939 - 2⁹ = 6918427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6918894 and 6918903.

It is not an unprimeable number, because it can be changed into a prime (6918959) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 4017 + ... + 5474.

It is an arithmetic number, because the mean of its divisors is an integer number (741054).

Almost surely, 2^6918939 is an apocalyptic number.

6918939 is a deficient number, since it is larger than the sum of its proper divisors (3455817).

6918939 is an frugal number, since it uses more digits than its factorization.

6918939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9509 (or 9494 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 6918939 is about 2630.3876140219. The cubic root of 6918939 is about 190.5518489905.

The spelling of 6918939 in words is "six million, nine hundred eighteen thousand, nine hundred thirty-nine".