291982 has 4 divisors (see below), whose sum is σ = 437976. Its totient is φ = 145990.

The previous prime is 291979. The next prime is 291983. The reversal of 291982 is 289192.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72994 + ... + 72997.

It is an arithmetic number, because the mean of its divisors is an integer number (109494).

2²⁹¹⁹⁸² is an apocalyptic number.

291982 is a deficient number, since it is larger than the sum of its proper divisors (145994).

291982 is a wasteful number, since it uses less digits than its factorization.

291982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145993.

The product of its digits is 2592, while the sum is 31.

The square root of 291982 is about 540.3535879403. The cubic root of 291982 is about 66.3415111309.

The spelling of 291982 in words is "two hundred ninety-one thousand, nine hundred eighty-two".