248249779 has 2 divisors, whose sum is σ = 248249780. Its totient is φ = 248249778.

The previous prime is 248249753. The next prime is 248249791. The reversal of 248249779 is 977942842.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 248249779 - 2¹¹ = 248247731 is a prime.

It is not a weakly prime, because it can be changed into another prime (248249719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124124889 + 124124890.

It is an arithmetic number, because the mean of its divisors is an integer number (124124890).

Almost surely, 2^248249779 is an apocalyptic number.

248249779 is a deficient number, since it is larger than the sum of its proper divisors (1).

248249779 is an equidigital number, since it uses as much as digits as its factorization.

248249779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 52.

The square root of 248249779 is about 15755.9442433642. The cubic root of 248249779 is about 628.4869873704.

The spelling of 248249779 in words is "two hundred forty-eight million, two hundred forty-nine thousand, seven hundred seventy-nine".