291366 has 12 divisors (see below), whose sum is σ = 631332. Its totient is φ = 97116.

The previous prime is 291359. The next prime is 291367. The reversal of 291366 is 663192.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291367) 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, 8076 + ... + 8111.

It is an arithmetic number, because the mean of its divisors is an integer number (52611).

2²⁹¹³⁶⁶ is an apocalyptic number.

291366 is an abundant number, since it is smaller than the sum of its proper divisors (339966).

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

291366 is a wasteful number, since it uses less digits than its factorization.

291366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16195 (or 16192 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 291366 is about 539.7832898488. The cubic root of 291366 is about 66.2948242993.

The spelling of 291366 in words is "two hundred ninety-one thousand, three hundred sixty-six".