985543139 has 16 divisors (see below), whose sum is σ = 1149258240. Its totient is φ = 827655360.

The previous prime is 985543121. The next prime is 985543157. The reversal of 985543139 is 931345589.

It is an interprime number because it is at equal distance from previous prime (985543121) and next prime (985543157).

It is a de Polignac number, because none of the positive numbers 2^k-985543139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 985543093 and 985543102.

It is not an unprimeable number, because it can be changed into a prime (985543439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124607 + ... + 132279.

It is an arithmetic number, because the mean of its divisors is an integer number (71828640).

Almost surely, 2^985543139 is an apocalyptic number.

985543139 is a deficient number, since it is larger than the sum of its proper divisors (163715101).

985543139 is a wasteful number, since it uses less digits than its factorization.

985543139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050.

The product of its digits is 583200, while the sum is 47.

The square root of 985543139 is about 31393.3613842162. The cubic root of 985543139 is about 995.1576356899.

The spelling of 985543139 in words is "nine hundred eighty-five million, five hundred forty-three thousand, one hundred thirty-nine".