39138271349869 has 2 divisors, whose sum is σ = 39138271349870. Its totient is φ = 39138271349868.

The previous prime is 39138271349741. The next prime is 39138271349887. The reversal of 39138271349869 is 96894317283193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32999992571844 + 6138278778025 = 5744562^2 + 2477555^2 .

It is a cyclic number.

It is not a de Polignac number, because 39138271349869 - 2⁷ = 39138271349741 is a prime.

It is a super-2 number, since 2×39138271349869² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39138271340869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569135674934 + 19569135674935.

It is an arithmetic number, because the mean of its divisors is an integer number (19569135674935).

Almost surely, 2^{39138271349869} is an apocalyptic number.

It is an amenable number.

39138271349869 is a deficient number, since it is larger than the sum of its proper divisors (1).

39138271349869 is an equidigital number, since it uses as much as digits as its factorization.

39138271349869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423263232, while the sum is 73.

The spelling of 39138271349869 in words is "thirty-nine trillion, one hundred thirty-eight billion, two hundred seventy-one million, three hundred forty-nine thousand, eight hundred sixty-nine".