291996 has 18 divisors (see below), whose sum is σ = 738192. Its totient is φ = 97320.

The previous prime is 291983. The next prime is 291997. The reversal of 291996 is 699192.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 8111 = 291996 / (2 + 9 + 1 + 9 + 9 + 6).

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

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 291996.

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 291996.

It is not an unprimeable number, because it can be changed into a prime (291997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4020 + ... + 4091.

2²⁹¹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

291996 is an abundant number, since it is smaller than the sum of its proper divisors (446196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

291996 is a wasteful number, since it uses less digits than its factorization.

291996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121 (or 8116 counting only the distinct ones).

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

The square root of 291996 is about 540.3665422655. The cubic root of 291996 is about 66.3425714318.

It can be divided in two parts, 29 and 1996, that added together give a square (2025 = 45²).

The spelling of 291996 in words is "two hundred ninety-one thousand, nine hundred ninety-six".