139089389 has 2 divisors, whose sum is σ = 139089390. Its totient is φ = 139089388.

The previous prime is 139089361. The next prime is 139089421. The reversal of 139089389 is 983980931.

139089389 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., 135536164 + 3553225 = 11642^2 + 1885^2 .

It is an emirp because it is prime and its reverse (983980931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139089389 - 2¹⁶ = 139023853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139083389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69544694 + 69544695.

It is an arithmetic number, because the mean of its divisors is an integer number (69544695).

Almost surely, 2^139089389 is an apocalyptic number.

It is an amenable number.

139089389 is a deficient number, since it is larger than the sum of its proper divisors (1).

139089389 is an equidigital number, since it uses as much as digits as its factorization.

139089389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 139089389 is about 11793.6164512841. The cubic root of 139089389 is about 518.1211646916.

The spelling of 139089389 in words is "one hundred thirty-nine million, eighty-nine thousand, three hundred eighty-nine".