395009 has 8 divisors (see below), whose sum is σ = 417960. Its totient is φ = 372736.

The previous prime is 394993. The next prime is 395023. The reversal of 395009 is 900593.

It can be written as a sum of positive squares in 4 ways, for example, as 222784 + 172225 = 472^2 + 415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 395009 - 2⁴ = 394993 is a prime.

It is a super-2 number, since 2×395009² = 312064220162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409 + ... + 1665.

It is an arithmetic number, because the mean of its divisors is an integer number (52245).

2³⁹⁵⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

395009 is a deficient number, since it is larger than the sum of its proper divisors (22951).

395009 is a wasteful number, since it uses less digits than its factorization.

395009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 395009 is about 628.4974144736. The cubic root of 395009 is about 73.3728964665.

The spelling of 395009 in words is "three hundred ninety-five thousand, nine".