249897 has 4 divisors (see below), whose sum is σ = 333200. Its totient is φ = 166596.

The previous prime is 249881. The next prime is 249911. The reversal of 249897 is 798942.

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 not a de Polignac number, because 249897 - 2⁴ = 249881 is a prime.

It is a D-number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249897.

It is not an unprimeable number, because it can be changed into a prime (249827) 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, 41647 + ... + 41652.

It is an arithmetic number, because the mean of its divisors is an integer number (83300).

2²⁴⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

249897 is a deficient number, since it is larger than the sum of its proper divisors (83303).

249897 is an equidigital number, since it uses as much as digits as its factorization.

249897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83302.

The product of its digits is 36288, while the sum is 39.

The square root of 249897 is about 499.8969893888. The cubic root of 249897 is about 62.9873998485.

The spelling of 249897 in words is "two hundred forty-nine thousand, eight hundred ninety-seven".