248771191 has 2 divisors, whose sum is σ = 248771192. Its totient is φ = 248771190.

The previous prime is 248771179. The next prime is 248771221. The reversal of 248771191 is 191177842.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 248771191 - 2²¹ = 246674039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248771111) 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, 124385595 + 124385596.

It is an arithmetic number, because the mean of its divisors is an integer number (124385596).

Almost surely, 2^248771191 is an apocalyptic number.

248771191 is a deficient number, since it is larger than the sum of its proper divisors (1).

248771191 is an equidigital number, since it uses as much as digits as its factorization.

248771191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 40.

The square root of 248771191 is about 15772.4820811437. The cubic root of 248771191 is about 628.9266943687.

The spelling of 248771191 in words is "two hundred forty-eight million, seven hundred seventy-one thousand, one hundred ninety-one".