138616369 has 2 divisors, whose sum is σ = 138616370. Its totient is φ = 138616368.

The previous prime is 138616337. The next prime is 138616397. The reversal of 138616369 is 963616831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118004769 + 20611600 = 10863^2 + 4540^2 .

It is a cyclic number.

It is not a de Polignac number, because 138616369 - 2⁵ = 138616337 is a prime.

It is a super-2 number, since 2×138616369² = 38428995509488322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138616669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69308184 + 69308185.

It is an arithmetic number, because the mean of its divisors is an integer number (69308185).

Almost surely, 2^138616369 is an apocalyptic number.

It is an amenable number.

138616369 is a deficient number, since it is larger than the sum of its proper divisors (1).

138616369 is an equidigital number, since it uses as much as digits as its factorization.

138616369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 138616369 is about 11773.5453029238. The cubic root of 138616369 is about 517.5331494864.

The spelling of 138616369 in words is "one hundred thirty-eight million, six hundred sixteen thousand, three hundred sixty-nine".