6968139 has 4 divisors (see below), whose sum is σ = 9290856. Its totient is φ = 4645424.

The previous prime is 6968123. The next prime is 6968141. The reversal of 6968139 is 9318696.

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 6968139 - 2⁴ = 6968123 is a prime.

It is a super-2 number, since 2×6968139² = 97109922246642, which contains 22 as substring.

It is a D-number.

6968139 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6968139.

It is not an unprimeable number, because it can be changed into a prime (6968119) 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, 1161354 + ... + 1161359.

It is an arithmetic number, because the mean of its divisors is an integer number (2322714).

Almost surely, 2^6968139 is an apocalyptic number.

6968139 is a deficient number, since it is larger than the sum of its proper divisors (2322717).

6968139 is a wasteful number, since it uses less digits than its factorization.

6968139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322716.

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

The square root of 6968139 is about 2639.7232809520. The cubic root of 6968139 is about 191.0024487319.

The spelling of 6968139 in words is "six million, nine hundred sixty-eight thousand, one hundred thirty-nine".