991419 has 16 divisors (see below), whose sum is σ = 1553664. Its totient is φ = 554400.

The previous prime is 991409. The next prime is 991427. The reversal of 991419 is 914199.

It is not a de Polignac number, because 991419 - 2⁵ = 991387 is a prime.

It is a super-2 number, since 2×991419² = 1965823267122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 991419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 727 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (97104).

2⁹⁹¹⁴¹⁹ is an apocalyptic number.

991419 is a deficient number, since it is larger than the sum of its proper divisors (562245).

991419 is a wasteful number, since it uses less digits than its factorization.

991419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338.

The product of its digits is 2916, while the sum is 33.

The square root of 991419 is about 995.7002561012. The cubic root of 991419 is about 99.7131445932.

The spelling of 991419 in words is "nine hundred ninety-one thousand, four hundred nineteen".