297649 has 4 divisors (see below), whose sum is σ = 324720. Its totient is φ = 270580.

The previous prime is 297641. The next prime is 297659. The reversal of 297649 is 946792.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 297649 - 2³ = 297641 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁹ + 9² + 6⁷ + 7 + 4⁷ + 9³ .

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, 13519 + ... + 13540.

It is an arithmetic number, because the mean of its divisors is an integer number (81180).

2²⁹⁷⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

297649 is a deficient number, since it is larger than the sum of its proper divisors (27071).

297649 is a wasteful number, since it uses less digits than its factorization.

297649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27070.

The product of its digits is 27216, while the sum is 37.

The square root of 297649 is about 545.5721767099. The cubic root of 297649 is about 66.7679654448.

It can be divided in two parts, 2976 and 49, that added together give a square (3025 = 55²).

The spelling of 297649 in words is "two hundred ninety-seven thousand, six hundred forty-nine".