138356258969 has 2 divisors, whose sum is σ = 138356258970. Its totient is φ = 138356258968.

The previous prime is 138356258927. The next prime is 138356259043. The reversal of 138356258969 is 969852653831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77551110400 + 60805148569 = 278480^2 + 246587^2 .

It is an emirp because it is prime and its reverse (969852653831) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138356258969 is a prime.

It is a super-2 number, since 2×138356258969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138355258969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69178129484 + 69178129485.

It is an arithmetic number, because the mean of its divisors is an integer number (69178129485).

Almost surely, 2^138356258969 is an apocalyptic number.

It is an amenable number.

138356258969 is a deficient number, since it is larger than the sum of its proper divisors (1).

138356258969 is an equidigital number, since it uses as much as digits as its factorization.

138356258969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83980800, while the sum is 65.

The spelling of 138356258969 in words is "one hundred thirty-eight billion, three hundred fifty-six million, two hundred fifty-eight thousand, nine hundred sixty-nine".