6989181329 has 8 divisors (see below), whose sum is σ = 7530570600. Its totient is φ = 6448329216.

The previous prime is 6989181307. The next prime is 6989181347. The reversal of 6989181329 is 9231819896.

It can be written as a sum of positive squares in 4 ways, for example, as 1133870929 + 5855310400 = 33673^2 + 76520^2 .

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 6989181329 - 2²⁴ = 6972404113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6989181349) 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, 107054 + ... + 159495.

It is an arithmetic number, because the mean of its divisors is an integer number (941321325).

Almost surely, 2^6989181329 is an apocalyptic number.

It is an amenable number.

6989181329 is a deficient number, since it is larger than the sum of its proper divisors (541389271).

6989181329 is a wasteful number, since it uses less digits than its factorization.

6989181329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268579.

The product of its digits is 1679616, while the sum is 56.

The square root of 6989181329 is about 83601.3237275583. The cubic root of 6989181329 is about 1911.9451806766.

The spelling of 6989181329 in words is "six billion, nine hundred eighty-nine million, one hundred eighty-one thousand, three hundred twenty-nine".