6930278639 has 8 divisors (see below), whose sum is σ = 7163009280. Its totient is φ = 6701101336.

The previous prime is 6930278623. The next prime is 6930278647. The reversal of 6930278639 is 9368720396.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6930278639 - 2⁴ = 6930278623 is a prime.

It is a super-3 number, since 3×6930278639³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6930278609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 884369 + ... + 892170.

It is an arithmetic number, because the mean of its divisors is an integer number (895376160).

Almost surely, 2^6930278639 is an apocalyptic number.

6930278639 is a deficient number, since it is larger than the sum of its proper divisors (232730641).

6930278639 is a wasteful number, since it uses less digits than its factorization.

6930278639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776669.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The square root of 6930278639 is about 83248.2951116718. The cubic root of 6930278639 is about 1906.5589238954.

The spelling of 6930278639 in words is "six billion, nine hundred thirty million, two hundred seventy-eight thousand, six hundred thirty-nine".