139398613 has 2 divisors, whose sum is σ = 139398614. Its totient is φ = 139398612.

The previous prime is 139398601. The next prime is 139398643. The reversal of 139398613 is 316893931.

It is a happy number.

139398613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138721284 + 677329 = 11778^2 + 823^2 .

It is a cyclic number.

It is not a de Polignac number, because 139398613 - 2¹³ = 139390421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139398613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139398643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69699306 + 69699307.

It is an arithmetic number, because the mean of its divisors is an integer number (69699307).

Almost surely, 2^139398613 is an apocalyptic number.

It is an amenable number.

139398613 is a deficient number, since it is larger than the sum of its proper divisors (1).

139398613 is an equidigital number, since it uses as much as digits as its factorization.

139398613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 43.

The square root of 139398613 is about 11806.7189769216. The cubic root of 139398613 is about 518.5048434085.

The spelling of 139398613 in words is "one hundred thirty-nine million, three hundred ninety-eight thousand, six hundred thirteen".