982139161 has 4 divisors (see below), whose sum is σ = 990830772. Its totient is φ = 973447552.

The previous prime is 982139087. The next prime is 982139167. The reversal of 982139161 is 161931289.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161931289 = 13 ⋅12456253.

It can be written as a sum of positive squares in 2 ways, for example, as 377913600 + 604225561 = 19440^2 + 24581^2 .

It is a cyclic number.

It is not a de Polignac number, because 982139161 - 2¹⁷ = 982008089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (982139167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4345636 + ... + 4345861.

It is an arithmetic number, because the mean of its divisors is an integer number (247707693).

Almost surely, 2^982139161 is an apocalyptic number.

It is an amenable number.

982139161 is a deficient number, since it is larger than the sum of its proper divisors (8691611).

982139161 is a wasteful number, since it uses less digits than its factorization.

982139161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8691610.

The product of its digits is 23328, while the sum is 40.

The square root of 982139161 is about 31339.0995563051. The cubic root of 982139161 is about 994.0105855339.

The spelling of 982139161 in words is "nine hundred eighty-two million, one hundred thirty-nine thousand, one hundred sixty-one".