991353 has 12 divisors (see below), whose sum is σ = 1453424. Its totient is φ = 600600.

The previous prime is 991343. The next prime is 991357. The reversal of 991353 is 353199.

991353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 991353 - 2⁹ = 990841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 991353.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991353.

It is not an unprimeable number, because it can be changed into a prime (991357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1003 + ... + 1728.

2⁹⁹¹³⁵³ is an apocalyptic number.

It is an amenable number.

991353 is a deficient number, since it is larger than the sum of its proper divisors (462071).

991353 is a wasteful number, since it uses less digits than its factorization.

991353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756 (or 2745 counting only the distinct ones).

The product of its digits is 3645, while the sum is 30.

The square root of 991353 is about 995.6671130453. The cubic root of 991353 is about 99.7109318680.

The spelling of 991353 in words is "nine hundred ninety-one thousand, three hundred fifty-three".