395000491 has 4 divisors (see below), whose sum is σ = 418235832. Its totient is φ = 371765152.

The previous prime is 395000479. The next prime is 395000509. The reversal of 395000491 is 194000593.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 395000491 - 2¹⁵ = 394967723 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395000461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11617645 + ... + 11617678.

It is an arithmetic number, because the mean of its divisors is an integer number (104558958).

Almost surely, 2^395000491 is an apocalyptic number.

395000491 is a deficient number, since it is larger than the sum of its proper divisors (23235341).

395000491 is a wasteful number, since it uses less digits than its factorization.

395000491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23235340.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 395000491 is about 19874.6192667935. The cubic root of 395000491 is about 733.7236961395.

The spelling of 395000491 in words is "three hundred ninety-five million, four hundred ninety-one", and thus it is an aban number.