139144613 has 2 divisors, whose sum is σ = 139144614. Its totient is φ = 139144612.

The previous prime is 139144601. The next prime is 139144627. The reversal of 139144613 is 316441931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82864609 + 56280004 = 9103^2 + 7502^2 .

It is a cyclic number.

It is not a de Polignac number, because 139144613 - 2¹⁶ = 139079077 is a prime.

It is a super-2 number, since 2×139144613² = 38722446653839538, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 139144613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139144513) 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, 69572306 + 69572307.

It is an arithmetic number, because the mean of its divisors is an integer number (69572307).

Almost surely, 2^139144613 is an apocalyptic number.

It is an amenable number.

139144613 is a deficient number, since it is larger than the sum of its proper divisors (1).

139144613 is an equidigital number, since it uses as much as digits as its factorization.

139144613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 139144613 is about 11795.9574855117. The cubic root of 139144613 is about 518.1897271641.

The spelling of 139144613 in words is "one hundred thirty-nine million, one hundred forty-four thousand, six hundred thirteen".