291992 has 32 divisors (see below), whose sum is σ = 615600. Its totient is φ = 129024.

The previous prime is 291983. The next prime is 291997. The reversal of 291992 is 299192.

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 291992.

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 7 ways as a sum of consecutive naturals, for example, 2528 + ... + 2640.

2²⁹¹⁹⁹² is an apocalyptic number.

It is an amenable number.

291992 is an abundant number, since it is smaller than the sum of its proper divisors (323608).

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

291992 is a wasteful number, since it uses less digits than its factorization.

291992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 151 counting only the distinct ones).

The product of its digits is 2916, while the sum is 32.

The square root of 291992 is about 540.3628410614. The cubic root of 291992 is about 66.3422684921.

The spelling of 291992 in words is "two hundred ninety-one thousand, nine hundred ninety-two".