6968639 has 4 divisors (see below), whose sum is σ = 6973920. Its totient is φ = 6963360.

The previous prime is 6968629. The next prime is 6968659. The reversal of 6968639 is 9368696.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6968639 - 2¹⁶ = 6903103 is a prime.

It is a super-3 number, since 3×6968639³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6968593 and 6968602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6968629) 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, 1274 + ... + 3944.

It is an arithmetic number, because the mean of its divisors is an integer number (1743480).

Almost surely, 2^6968639 is an apocalyptic number.

6968639 is a deficient number, since it is larger than the sum of its proper divisors (5281).

6968639 is a wasteful number, since it uses less digits than its factorization.

6968639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5280.

The product of its digits is 419904, while the sum is 47.

The square root of 6968639 is about 2639.8179861498. The cubic root of 6968639 is about 191.0070170937.

The spelling of 6968639 in words is "six million, nine hundred sixty-eight thousand, six hundred thirty-nine".