139054813 has 2 divisors, whose sum is σ = 139054814. Its totient is φ = 139054812.

The previous prime is 139054801. The next prime is 139054847. The reversal of 139054813 is 318450931.

It is an a-pointer prime, because the next prime (139054847) can be obtained adding 139054813 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129549924 + 9504889 = 11382^2 + 3083^2 .

It is a cyclic number.

It is not a de Polignac number, because 139054813 - 2⁹ = 139054301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139054873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69527406 + 69527407.

It is an arithmetic number, because the mean of its divisors is an integer number (69527407).

Almost surely, 2^139054813 is an apocalyptic number.

It is an amenable number.

139054813 is a deficient number, since it is larger than the sum of its proper divisors (1).

139054813 is an equidigital number, since it uses as much as digits as its factorization.

139054813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 139054813 is about 11792.1504824184. The cubic root of 139054813 is about 518.0782281739.

The spelling of 139054813 in words is "one hundred thirty-nine million, fifty-four thousand, eight hundred thirteen".