139527137 has 2 divisors, whose sum is σ = 139527138. Its totient is φ = 139527136.

The previous prime is 139527121. The next prime is 139527151. The reversal of 139527137 is 731725931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139334416 + 192721 = 11804^2 + 439^2 .

It is an emirp because it is prime and its reverse (731725931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139527137 - 2⁴ = 139527121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139527137.

It is not a weakly prime, because it can be changed into another prime (139527107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69763568 + 69763569.

It is an arithmetic number, because the mean of its divisors is an integer number (69763569).

Almost surely, 2^139527137 is an apocalyptic number.

It is an amenable number.

139527137 is a deficient number, since it is larger than the sum of its proper divisors (1).

139527137 is an equidigital number, since it uses as much as digits as its factorization.

139527137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 38.

The square root of 139527137 is about 11812.1605559694. The cubic root of 139527137 is about 518.6641463958.

The spelling of 139527137 in words is "one hundred thirty-nine million, five hundred twenty-seven thousand, one hundred thirty-seven".