138616337 has 2 divisors, whose sum is σ = 138616338. Its totient is φ = 138616336.

The previous prime is 138616307. The next prime is 138616369. The reversal of 138616337 is 733616831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111534721 + 27081616 = 10561^2 + 5204^2 .

It is a cyclic number.

It is not a de Polignac number, because 138616337 - 2⁶ = 138616273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138616337.

It is not a weakly prime, because it can be changed into another prime (138616307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69308168 + 69308169.

It is an arithmetic number, because the mean of its divisors is an integer number (69308169).

Almost surely, 2^138616337 is an apocalyptic number.

It is an amenable number.

138616337 is a deficient number, since it is larger than the sum of its proper divisors (1).

138616337 is an equidigital number, since it uses as much as digits as its factorization.

138616337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 138616337 is about 11773.5439439448. The cubic root of 138616337 is about 517.5331096617.

The spelling of 138616337 in words is "one hundred thirty-eight million, six hundred sixteen thousand, three hundred thirty-seven".