991395 has 12 divisors (see below), whose sum is σ = 1718496. Its totient is φ = 528720.

The previous prime is 991387. The next prime is 991409. The reversal of 991395 is 593199.

It is not a de Polignac number, because 991395 - 2³ = 991387 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991395.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10971 + ... + 11060.

It is an arithmetic number, because the mean of its divisors is an integer number (143208).

2⁹⁹¹³⁹⁵ is an apocalyptic number.

991395 is a deficient number, since it is larger than the sum of its proper divisors (727101).

991395 is a wasteful number, since it uses less digits than its factorization.

991395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22042 (or 22039 counting only the distinct ones).

The product of its digits is 10935, while the sum is 36.

The square root of 991395 is about 995.6882042085. The cubic root of 991395 is about 99.7123399772.

The spelling of 991395 in words is "nine hundred ninety-one thousand, three hundred ninety-five".