6981132139 has 8 divisors (see below), whose sum is σ = 7181417840. Its totient is φ = 6781457376.

The previous prime is 6981132121. The next prime is 6981132149. The reversal of 6981132139 is 9312311896.

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 6981132139 - 2⁹ = 6981131627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6981132095 and 6981132104.

It is not an unprimeable number, because it can be changed into a prime (6981132149) 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, 129504 + ... + 175309.

It is an arithmetic number, because the mean of its divisors is an integer number (897677230).

Almost surely, 2^6981132139 is an apocalyptic number.

6981132139 is a deficient number, since it is larger than the sum of its proper divisors (200285701).

6981132139 is a wasteful number, since it uses less digits than its factorization.

6981132139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305469.

The product of its digits is 69984, while the sum is 43.

The square root of 6981132139 is about 83553.1695329387. The cubic root of 6981132139 is about 1911.2109257868.

The spelling of 6981132139 in words is "six billion, nine hundred eighty-one million, one hundred thirty-two thousand, one hundred thirty-nine".