290247 has 4 divisors (see below), whose sum is σ = 387000. Its totient is φ = 193496.

The previous prime is 290243. The next prime is 290249. The reversal of 290247 is 742092.

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

It is a cyclic number.

It is not a de Polignac number, because 290247 - 2² = 290243 is a prime.

It is a D-number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (290243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48372 + ... + 48377.

It is an arithmetic number, because the mean of its divisors is an integer number (96750).

2²⁹⁰²⁴⁷ is an apocalyptic number.

290247 is a deficient number, since it is larger than the sum of its proper divisors (96753).

290247 is an equidigital number, since it uses as much as digits as its factorization.

290247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96752.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 290247 is about 538.7457656446. The cubic root of 290247 is about 66.2098463219.

The spelling of 290247 in words is "two hundred ninety thousand, two hundred forty-seven".