139461187 has 2 divisors, whose sum is σ = 139461188. Its totient is φ = 139461186.

The previous prime is 139461181. The next prime is 139461193. The reversal of 139461187 is 781164931.

It is a balanced prime because it is at equal distance from previous prime (139461181) and next prime (139461193).

It is an emirp because it is prime and its reverse (781164931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139461187 - 2¹¹ = 139459139 is a prime.

It is not a weakly prime, because it can be changed into another prime (139461181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69730593 + 69730594.

It is an arithmetic number, because the mean of its divisors is an integer number (69730594).

Almost surely, 2^139461187 is an apocalyptic number.

139461187 is a deficient number, since it is larger than the sum of its proper divisors (1).

139461187 is an equidigital number, since it uses as much as digits as its factorization.

139461187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 139461187 is about 11809.3686114034. The cubic root of 139461187 is about 518.5824148848.

The spelling of 139461187 in words is "one hundred thirty-nine million, four hundred sixty-one thousand, one hundred eighty-seven".