139188141 has 6 divisors (see below), whose sum is σ = 201049550. Its totient is φ = 92792088.

The previous prime is 139188131. The next prime is 139188149. The reversal of 139188141 is 141881931.

It can be written as a sum of positive squares in only one way, i.e., 139004100 + 184041 = 11790^2 + 429^2 .

It is not a de Polignac number, because 139188141 - 2⁷ = 139188013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139188096 and 139188105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139188149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7732666 + ... + 7732683.

Almost surely, 2^139188141 is an apocalyptic number.

It is an amenable number.

139188141 is a deficient number, since it is larger than the sum of its proper divisors (61861409).

139188141 is a wasteful number, since it uses less digits than its factorization.

139188141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15465355 (or 15465352 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 139188141 is about 11797.8023801045. The cubic root of 139188141 is about 518.2437558718.

The spelling of 139188141 in words is "one hundred thirty-nine million, one hundred eighty-eight thousand, one hundred forty-one".