248563979 has 2 divisors, whose sum is σ = 248563980. Its totient is φ = 248563978.

The previous prime is 248563961. The next prime is 248563981. The reversal of 248563979 is 979365842.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-248563979 is a prime.

Together with 248563981, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 248563979.

It is not a weakly prime, because it can be changed into another prime (248563949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124281989 + 124281990.

It is an arithmetic number, because the mean of its divisors is an integer number (124281990).

Almost surely, 2^248563979 is an apocalyptic number.

248563979 is a deficient number, since it is larger than the sum of its proper divisors (1).

248563979 is an equidigital number, since it uses as much as digits as its factorization.

248563979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 53.

The square root of 248563979 is about 15765.9119304910. The cubic root of 248563979 is about 628.7520260215.

The spelling of 248563979 in words is "two hundred forty-eight million, five hundred sixty-three thousand, nine hundred seventy-nine".