395928139 has 2 divisors, whose sum is σ = 395928140. Its totient is φ = 395928138.

The previous prime is 395928107. The next prime is 395928167. The reversal of 395928139 is 931829593.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 395928139 - 2⁵ = 395928107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 395928092 and 395928101.

It is not a weakly prime, because it can be changed into another prime (395928539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197964069 + 197964070.

It is an arithmetic number, because the mean of its divisors is an integer number (197964070).

Almost surely, 2^395928139 is an apocalyptic number.

395928139 is a deficient number, since it is larger than the sum of its proper divisors (1).

395928139 is an equidigital number, since it uses as much as digits as its factorization.

395928139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 49.

The square root of 395928139 is about 19897.9430846507. The cubic root of 395928139 is about 734.2976238598.

The spelling of 395928139 in words is "three hundred ninety-five million, nine hundred twenty-eight thousand, one hundred thirty-nine".