395021339 has 4 divisors (see below), whose sum is σ = 395208840. Its totient is φ = 394833840.

The previous prime is 395021311. The next prime is 395021357. The reversal of 395021339 is 933120593.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933120593 = 15643 ⋅59651.

It is a cyclic number.

It is not a de Polignac number, because 395021339 - 2⁸ = 395021083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 395021299 and 395021308.

It is not an unprimeable number, because it can be changed into a prime (395021369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90554 + ... + 94815.

It is an arithmetic number, because the mean of its divisors is an integer number (98802210).

Almost surely, 2^395021339 is an apocalyptic number.

395021339 is a deficient number, since it is larger than the sum of its proper divisors (187501).

395021339 is a wasteful number, since it uses less digits than its factorization.

395021339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187500.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 395021339 is about 19875.1437479078. The cubic root of 395021339 is about 733.7366044800.

The spelling of 395021339 in words is "three hundred ninety-five million, twenty-one thousand, three hundred thirty-nine".