248745491 has 2 divisors, whose sum is σ = 248745492. Its totient is φ = 248745490.

The previous prime is 248745461. The next prime is 248745509. The reversal of 248745491 is 194547842.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 248745491 - 2²² = 244551187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (248745421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124372745 + 124372746.

It is an arithmetic number, because the mean of its divisors is an integer number (124372746).

Almost surely, 2^248745491 is an apocalyptic number.

248745491 is a deficient number, since it is larger than the sum of its proper divisors (1).

248745491 is an equidigital number, since it uses as much as digits as its factorization.

248745491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 44.

The square root of 248745491 is about 15771.6673500299. The cubic root of 248745491 is about 628.9050359489.

The spelling of 248745491 in words is "two hundred forty-eight million, seven hundred forty-five thousand, four hundred ninety-one".