6996139 has 4 divisors (see below), whose sum is σ = 7032960. Its totient is φ = 6959320.

The previous prime is 6996137. The next prime is 6996149. The reversal of 6996139 is 9316996.

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 6996139 - 2¹ = 6996137 is a prime.

It is a Duffinian number.

6996139 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6996095 and 6996104.

It is not an unprimeable number, because it can be changed into a prime (6996133) 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, 18124 + ... + 18505.

It is an arithmetic number, because the mean of its divisors is an integer number (1758240).

Almost surely, 2^6996139 is an apocalyptic number.

6996139 is a deficient number, since it is larger than the sum of its proper divisors (36821).

6996139 is a wasteful number, since it uses less digits than its factorization.

6996139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36820.

The product of its digits is 78732, while the sum is 43.

The square root of 6996139 is about 2645.0215500067. The cubic root of 6996139 is about 191.2579412027.

The spelling of 6996139 in words is "six million, nine hundred ninety-six thousand, one hundred thirty-nine".