139882732081 has 3 divisors (see below), whose sum is σ = 139883106091. Its totient is φ = 139882358072.

The previous prime is 139882732079. The next prime is 139882732109. The reversal of 139882732081 is 180237288931.

The square root of 139882732081 is 374009.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 2419754481 + 137462977600 = 49191^2 + 370760^2 .

It is not a de Polignac number, because 139882732081 - 2¹ = 139882732079 is a prime.

It is a super-2 number, since 2×139882732081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139882732061) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 187005 + ... + 561013.

Almost surely, 2^139882732081 is an apocalyptic number.

139882732081 is the 374009-th square number.

139882732081 is the 187005-th centered octagonal number.

It is an amenable number.

139882732081 is a deficient number, since it is larger than the sum of its proper divisors (374010).

139882732081 is an frugal number, since it uses more digits than its factorization.

139882732081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748018 (or 374009 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 139882732081 in words is "one hundred thirty-nine billion, eight hundred eighty-two million, seven hundred thirty-two thousand, eighty-one".