139148813 has 2 divisors, whose sum is σ = 139148814. Its totient is φ = 139148812.

The previous prime is 139148773. The next prime is 139148819. The reversal of 139148813 is 318841931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108534724 + 30614089 = 10418^2 + 5533^2 .

It is an emirp because it is prime and its reverse (318841931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139148813 - 2⁸ = 139148557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139148819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69574406 + 69574407.

It is an arithmetic number, because the mean of its divisors is an integer number (69574407).

Almost surely, 2^139148813 is an apocalyptic number.

It is an amenable number.

139148813 is a deficient number, since it is larger than the sum of its proper divisors (1).

139148813 is an equidigital number, since it uses as much as digits as its factorization.

139148813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 139148813 is about 11796.1355112596. The cubic root of 139148813 is about 518.1949408645.

The spelling of 139148813 in words is "one hundred thirty-nine million, one hundred forty-eight thousand, eight hundred thirteen".