139488898181 has 4 divisors (see below), whose sum is σ = 140196963852. Its totient is φ = 138780832512.

The previous prime is 139488898147. The next prime is 139488898193. The reversal of 139488898181 is 181898884931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 181898884931 = 73 ⋅2491765547.

It can be written as a sum of positive squares in 2 ways, for example, as 127441860100 + 12047038081 = 356990^2 + 109759^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139488898181 is a prime.

It is a super-2 number, since 2×139488898181² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139488898111) 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, 354032540 + ... + 354032933.

It is an arithmetic number, because the mean of its divisors is an integer number (35049240963).

Almost surely, 2^139488898181 is an apocalyptic number.

It is an amenable number.

139488898181 is a deficient number, since it is larger than the sum of its proper divisors (708065671).

139488898181 is an equidigital number, since it uses as much as digits as its factorization.

139488898181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708065670.

The product of its digits is 31850496, while the sum is 68.

The spelling of 139488898181 in words is "one hundred thirty-nine billion, four hundred eighty-eight million, eight hundred ninety-eight thousand, one hundred eighty-one".