6979355639 has 4 divisors (see below), whose sum is σ = 7015896960. Its totient is φ = 6942814320.

The previous prime is 6979355623. The next prime is 6979355651. The reversal of 6979355639 is 9365539796.

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 6979355639 - 2⁴ = 6979355623 is a prime.

It is a super-2 number, since 2×6979355639² = 97422810271282196642, which contains 22 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 (6979355659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18270374 + ... + 18270755.

It is an arithmetic number, because the mean of its divisors is an integer number (1753974240).

Almost surely, 2^6979355639 is an apocalyptic number.

6979355639 is a deficient number, since it is larger than the sum of its proper divisors (36541321).

6979355639 is a wasteful number, since it uses less digits than its factorization.

6979355639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36541320.

The product of its digits is 41334300, while the sum is 62.

The square root of 6979355639 is about 83542.5379013590. The cubic root of 6979355639 is about 1911.0487957205.

The spelling of 6979355639 in words is "six billion, nine hundred seventy-nine million, three hundred fifty-five thousand, six hundred thirty-nine".