138360435989 has 2 divisors, whose sum is σ = 138360435990. Its totient is φ = 138360435988.

The previous prime is 138360435931. The next prime is 138360436003. The reversal of 138360435989 is 989534063831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121933656100 + 16426779889 = 349190^2 + 128167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138360435989 is a prime.

It is a super-2 number, since 2×138360435989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138360435919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69180217994 + 69180217995.

It is an arithmetic number, because the mean of its divisors is an integer number (69180217995).

Almost surely, 2^138360435989 is an apocalyptic number.

It is an amenable number.

138360435989 is a deficient number, since it is larger than the sum of its proper divisors (1).

138360435989 is an equidigital number, since it uses as much as digits as its factorization.

138360435989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 138360435989 in words is "one hundred thirty-eight billion, three hundred sixty million, four hundred thirty-five thousand, nine hundred eighty-nine".