6981709899587 has 8 divisors (see below), whose sum is σ = 7345292684352. Its totient is φ = 6627331742400.

The previous prime is 6981709899553. The next prime is 6981709899599. The reversal of 6981709899587 is 7859989071896.

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 6981709899587 - 2¹⁸ = 6981709637443 is a prime.

It is a super-2 number, since 2×6981709899587² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6981709899499 and 6981709899508.

It is not an unprimeable number, because it can be changed into a prime (6981709899517) 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, 2301155339 + ... + 2301158372.

It is an arithmetic number, because the mean of its divisors is an integer number (918161585544).

Almost surely, 2^{6981709899587} is an apocalyptic number.

6981709899587 is a deficient number, since it is larger than the sum of its proper divisors (363582784765).

6981709899587 is a wasteful number, since it uses less digits than its factorization.

6981709899587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602313789.

The product of its (nonzero) digits is 4938071040, while the sum is 86.

The spelling of 6981709899587 in words is "six trillion, nine hundred eighty-one billion, seven hundred nine million, eight hundred ninety-nine thousand, five hundred eighty-seven".