138413489 has 2 divisors, whose sum is σ = 138413490. Its totient is φ = 138413488.

The previous prime is 138413459. The next prime is 138413497. The reversal of 138413489 is 984314831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130347889 + 8065600 = 11417^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 138413489 - 2¹⁶ = 138347953 is a prime.

It is not a weakly prime, because it can be changed into another prime (138413459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69206744 + 69206745.

It is an arithmetic number, because the mean of its divisors is an integer number (69206745).

Almost surely, 2^138413489 is an apocalyptic number.

It is an amenable number.

138413489 is a deficient number, since it is larger than the sum of its proper divisors (1).

138413489 is an equidigital number, since it uses as much as digits as its factorization.

138413489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 138413489 is about 11764.9262216131. The cubic root of 138413489 is about 517.2805376853.

The spelling of 138413489 in words is "one hundred thirty-eight million, four hundred thirteen thousand, four hundred eighty-nine".