139889513 has 2 divisors, whose sum is σ = 139889514. Its totient is φ = 139889512.

The previous prime is 139889483. The next prime is 139889527. The reversal of 139889513 is 315988931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77668969 + 62220544 = 8813^2 + 7888^2 .

It is an emirp because it is prime and its reverse (315988931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139889513 - 2¹⁶ = 139823977 is a prime.

It is not a weakly prime, because it can be changed into another prime (139889543) 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, 69944756 + 69944757.

It is an arithmetic number, because the mean of its divisors is an integer number (69944757).

Almost surely, 2^139889513 is an apocalyptic number.

It is an amenable number.

139889513 is a deficient number, since it is larger than the sum of its proper divisors (1).

139889513 is an equidigital number, since it uses as much as digits as its factorization.

139889513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 47.

The square root of 139889513 is about 11827.4897167573. The cubic root of 139889513 is about 519.1127782606.

The spelling of 139889513 in words is "one hundred thirty-nine million, eight hundred eighty-nine thousand, five hundred thirteen".