249952643 has 2 divisors, whose sum is σ = 249952644. Its totient is φ = 249952642.

The previous prime is 249952639. The next prime is 249952667. The reversal of 249952643 is 346259942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249952643 - 2² = 249952639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 249952594 and 249952603.

It is not a weakly prime, because it can be changed into another prime (249952693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124976321 + 124976322.

It is an arithmetic number, because the mean of its divisors is an integer number (124976322).

Almost surely, 2^249952643 is an apocalyptic number.

249952643 is a deficient number, since it is larger than the sum of its proper divisors (1).

249952643 is an equidigital number, since it uses as much as digits as its factorization.

249952643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 44.

The square root of 249952643 is about 15809.8906700837. The cubic root of 249952643 is about 629.9207450481.

The spelling of 249952643 in words is "two hundred forty-nine million, nine hundred fifty-two thousand, six hundred forty-three".