249947 has 2 divisors, whose sum is σ = 249948. Its totient is φ = 249946.

The previous prime is 249943. The next prime is 249967. The reversal of 249947 is 749942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249947 - 2² = 249943 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 4⁵ + 9⁴ + 9⁵ + 4⁸ + 7⁶ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249947.

It is not a weakly prime, because it can be changed into another prime (249943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124973 + 124974.

It is an arithmetic number, because the mean of its divisors is an integer number (124974).

2²⁴⁹⁹⁴⁷ is an apocalyptic number.

249947 is a deficient number, since it is larger than the sum of its proper divisors (1).

249947 is an equidigital number, since it uses as much as digits as its factorization.

249947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 35.

The square root of 249947 is about 499.9469971907. The cubic root of 249947 is about 62.9916004591.

The spelling of 249947 in words is "two hundred forty-nine thousand, nine hundred forty-seven".