6981531123 has 12 divisors (see below), whose sum is σ = 10828497480. Its totient is φ = 3989446272.

The previous prime is 6981531121. The next prime is 6981531143. The reversal of 6981531123 is 3211351896.

It is not a de Polignac number, because 6981531123 - 2¹ = 6981531121 is a prime.

It is a super-2 number, since 2×6981531123² = 97483553642835282258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6981531121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23746558 + ... + 23746851.

It is an arithmetic number, because the mean of its divisors is an integer number (902374790).

Almost surely, 2^6981531123 is an apocalyptic number.

6981531123 is a deficient number, since it is larger than the sum of its proper divisors (3846966357).

6981531123 is a wasteful number, since it uses less digits than its factorization.

6981531123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47493426 (or 47493419 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 6981531123 is about 83555.5571042405. The cubic root of 6981531123 is about 1911.2473347837.

The spelling of 6981531123 in words is "six billion, nine hundred eighty-one million, five hundred thirty-one thousand, one hundred twenty-three".