249965563 has 2 divisors, whose sum is σ = 249965564. Its totient is φ = 249965562.

The previous prime is 249965557. The next prime is 249965623. The reversal of 249965563 is 365569942.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249965563 is a prime.

It is not a weakly prime, because it can be changed into another prime (249965503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124982781 + 124982782.

It is an arithmetic number, because the mean of its divisors is an integer number (124982782).

Almost surely, 2^249965563 is an apocalyptic number.

249965563 is a deficient number, since it is larger than the sum of its proper divisors (1).

249965563 is an equidigital number, since it uses as much as digits as its factorization.

249965563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1749600, while the sum is 49.

The square root of 249965563 is about 15810.2992697798. The cubic root of 249965563 is about 629.9315983517.

The spelling of 249965563 in words is "two hundred forty-nine million, nine hundred sixty-five thousand, five hundred sixty-three".