249397 has 2 divisors, whose sum is σ = 249398. Its totient is φ = 249396.

The previous prime is 249383. The next prime is 249419. The reversal of 249397 is 793942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221841 + 27556 = 471^2 + 166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (249317) 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 as a sum of consecutive naturals, namely, 124698 + 124699.

It is an arithmetic number, because the mean of its divisors is an integer number (124699).

2²⁴⁹³⁹⁷ is an apocalyptic number.

It is an amenable number.

249397 is a deficient number, since it is larger than the sum of its proper divisors (1).

249397 is an equidigital number, since it uses as much as digits as its factorization.

249397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 249397 is about 499.3966359518. The cubic root of 249397 is about 62.9453628922.

It can be divided in two parts, 249 and 397, that added together give a palindrome (646).

The spelling of 249397 in words is "two hundred forty-nine thousand, three hundred ninety-seven".