395881512139 has 2 divisors, whose sum is σ = 395881512140. Its totient is φ = 395881512138.

The previous prime is 395881512119. The next prime is 395881512161. The reversal of 395881512139 is 931215188593.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 395881512139 - 2⁷ = 395881512011 is a prime.

It is a super-2 number, since 2×395881512139² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 395881512139.

It is not a weakly prime, because it can be changed into another prime (395881512109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197940756069 + 197940756070.

It is an arithmetic number, because the mean of its divisors is an integer number (197940756070).

Almost surely, 2^395881512139 is an apocalyptic number.

395881512139 is a deficient number, since it is larger than the sum of its proper divisors (1).

395881512139 is an equidigital number, since it uses as much as digits as its factorization.

395881512139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 55.

The spelling of 395881512139 in words is "three hundred ninety-five billion, eight hundred eighty-one million, five hundred twelve thousand, one hundred thirty-nine".