6697139 has 4 divisors (see below), whose sum is σ = 7049640. Its totient is φ = 6344640.

The previous prime is 6697127. The next prime is 6697153. The reversal of 6697139 is 9317966.

It is a happy number.

6697139 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6697139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6697096 and 6697105.

It is not an unprimeable number, because it can be changed into a prime (6697109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176222 + ... + 176259.

It is an arithmetic number, because the mean of its divisors is an integer number (1762410).

Almost surely, 2^6697139 is an apocalyptic number.

6697139 is a deficient number, since it is larger than the sum of its proper divisors (352501).

6697139 is a wasteful number, since it uses less digits than its factorization.

6697139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352500.

The product of its digits is 61236, while the sum is 41.

The square root of 6697139 is about 2587.8831117344. The cubic root of 6697139 is about 188.4935256121.

The spelling of 6697139 in words is "six million, six hundred ninety-seven thousand, one hundred thirty-nine".