139527189 has 6 divisors (see below), whose sum is σ = 201539286. Its totient is φ = 93018120.

The previous prime is 139527151. The next prime is 139527197. The reversal of 139527189 is 981725931.

It can be written as a sum of positive squares in only one way, i.e., 125216100 + 14311089 = 11190^2 + 3783^2 .

It is not a de Polignac number, because 139527189 - 2⁷ = 139527061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139527889) 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, 7751502 + ... + 7751519.

It is an arithmetic number, because the mean of its divisors is an integer number (33589881).

Almost surely, 2^139527189 is an apocalyptic number.

It is an amenable number.

139527189 is a deficient number, since it is larger than the sum of its proper divisors (62012097).

139527189 is a wasteful number, since it uses less digits than its factorization.

139527189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15503027 (or 15503024 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 139527189 is about 11812.1627570907. The cubic root of 139527189 is about 518.6642108290.

The spelling of 139527189 in words is "one hundred thirty-nine million, five hundred twenty-seven thousand, one hundred eighty-nine".