6988375309 has 8 divisors (see below), whose sum is σ = 7039648152. Its totient is φ = 6937227840.

The previous prime is 6988375271. The next prime is 6988375349. The reversal of 6988375309 is 9035738896.

It can be written as a sum of positive squares in 4 ways, for example, as 1290390084 + 5697985225 = 35922^2 + 75485^2 .

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 6988375309 - 2¹³ = 6988367117 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 (6988375349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82039 + ... + 143899.

It is an arithmetic number, because the mean of its divisors is an integer number (879956019).

Almost surely, 2^6988375309 is an apocalyptic number.

It is an amenable number.

6988375309 is a deficient number, since it is larger than the sum of its proper divisors (51272843).

6988375309 is a wasteful number, since it uses less digits than its factorization.

6988375309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62687.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The square root of 6988375309 is about 83596.5029711172. The cubic root of 6988375309 is about 1911.8716801608.

The spelling of 6988375309 in words is "six billion, nine hundred eighty-eight million, three hundred seventy-five thousand, three hundred nine".