6698139 has 16 divisors (see below), whose sum is σ = 10536960. Its totient is φ = 3703680.

The previous prime is 6698099. The next prime is 6698143. The reversal of 6698139 is 9318966.

It is not a de Polignac number, because 6698139 - 2¹¹ = 6696091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6698139.

It is not an unprimeable number, because it can be changed into a prime (6698149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4494 + ... + 5795.

It is an arithmetic number, because the mean of its divisors is an integer number (658560).

Almost surely, 2^6698139 is an apocalyptic number.

6698139 is a deficient number, since it is larger than the sum of its proper divisors (3838821).

6698139 is a wasteful number, since it uses less digits than its factorization.

6698139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330.

The product of its digits is 69984, while the sum is 42.

The square root of 6698139 is about 2588.0763126307. The cubic root of 6698139 is about 188.5029069387.

The spelling of 6698139 in words is "six million, six hundred ninety-eight thousand, one hundred thirty-nine".