138364511 has 2 divisors, whose sum is σ = 138364512. Its totient is φ = 138364510.

The previous prime is 138364493. The next prime is 138364553. The reversal of 138364511 is 115463831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138364511 - 2¹⁰ = 138363487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138364561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69182255 + 69182256.

It is an arithmetic number, because the mean of its divisors is an integer number (69182256).

Almost surely, 2^138364511 is an apocalyptic number.

138364511 is a deficient number, since it is larger than the sum of its proper divisors (1).

138364511 is an equidigital number, since it uses as much as digits as its factorization.

138364511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 138364511 is about 11762.8445114266. The cubic root of 138364511 is about 517.2195167658.

The spelling of 138364511 in words is "one hundred thirty-eight million, three hundred sixty-four thousand, five hundred eleven".