991269 has 12 divisors (see below), whose sum is σ = 1450176. Its totient is φ = 652392.

The previous prime is 991261. The next prime is 991273. The reversal of 991269 is 962199.

It is not a de Polignac number, because 991269 - 2³ = 991261 is a prime.

It is a super-2 number, since 2×991269² = 1965228460722, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991269.

It is not an unprimeable number, because it can be changed into a prime (991261) 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, 84 + ... + 1410.

It is an arithmetic number, because the mean of its divisors is an integer number (120848).

2⁹⁹¹²⁶⁹ is an apocalyptic number.

It is an amenable number.

991269 is a deficient number, since it is larger than the sum of its proper divisors (458907).

991269 is a wasteful number, since it uses less digits than its factorization.

991269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416 (or 1413 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 991269 is about 995.6249293785. The cubic root of 991269 is about 99.7081155301.

The spelling of 991269 in words is "nine hundred ninety-one thousand, two hundred sixty-nine".