6865420279 has 4 divisors (see below), whose sum is σ = 6885792784. Its totient is φ = 6845047776.

The previous prime is 6865420277. The next prime is 6865420297. The reversal of 6865420279 is 9720245686.

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 6865420279 - 2¹ = 6865420277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6865420273) 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, 10185747 + ... + 10186420.

It is an arithmetic number, because the mean of its divisors is an integer number (1721448196).

Almost surely, 2^6865420279 is an apocalyptic number.

6865420279 is a deficient number, since it is larger than the sum of its proper divisors (20372505).

6865420279 is a wasteful number, since it uses less digits than its factorization.

6865420279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20372504.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 6865420279 is about 82857.8317300181. The cubic root of 6865420279 is about 1900.5926386735.

The spelling of 6865420279 in words is "six billion, eight hundred sixty-five million, four hundred twenty thousand, two hundred seventy-nine".