297643 has 4 divisors (see below), whose sum is σ = 310608. Its totient is φ = 284680.

The previous prime is 297641. The next prime is 297659. The reversal of 297643 is 346792.

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 297643 - 2¹ = 297641 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 9² + 6 + 7⁴ + 4⁹ + 3⁵ .

It is a Duffinian number.

297643 is a lucky number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (297641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6448 + ... + 6493.

It is an arithmetic number, because the mean of its divisors is an integer number (77652).

297643 is a Friedman number, since it can be written as 94^3/2-7^6, using all its digits and the basic arithmetic operations.

2²⁹⁷⁶⁴³ is an apocalyptic number.

297643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

297643 is a deficient number, since it is larger than the sum of its proper divisors (12965).

297643 is a wasteful number, since it uses less digits than its factorization.

297643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12964.

The product of its digits is 9072, while the sum is 31.

The square root of 297643 is about 545.5666778681. The cubic root of 297643 is about 66.7675168063.

The spelling of 297643 in words is "two hundred ninety-seven thousand, six hundred forty-three".