991046 has 16 divisors (see below), whose sum is σ = 1758240.
Its totient is φ = 409920.
The previous prime is 991043. The next prime is 991057. The reversal of 991046 is 640199.
It is a Harshad number since it is a multiple of its sum of digits (29).
It is a Curzon number.
It is a plaindrome in base 15.
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 991046.
It is not an unprimeable number, because it can be changed into a prime (991043) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815 + ... + 1626.
It is an arithmetic number, because the mean of its divisors is an integer number (109890).
2991046 is an apocalyptic number.
991046 is a deficient number, since it is larger than the sum of its proper divisors (767194).
991046 is a wasteful number, since it uses less digits than its factorization.
991046 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2479.
The product of its (nonzero) digits is 1944, while the sum is 29.
The square root of 991046 is about 995.5129331154.
The cubic root of 991046 is about 99.7006380518.
The spelling of 991046 in words is "nine hundred ninety-one thousand, forty-six".