248078861 has 2 divisors, whose sum is σ = 248078862. Its totient is φ = 248078860.

The previous prime is 248078837. The next prime is 248078903. The reversal of 248078861 is 168870842.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184796836 + 63282025 = 13594^2 + 7955^2 .

It is a cyclic number.

It is not a de Polignac number, because 248078861 - 2⁶ = 248078797 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (248018861) 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, 124039430 + 124039431.

It is an arithmetic number, because the mean of its divisors is an integer number (124039431).

Almost surely, 2^248078861 is an apocalyptic number.

It is an amenable number.

248078861 is a deficient number, since it is larger than the sum of its proper divisors (1).

248078861 is an equidigital number, since it uses as much as digits as its factorization.

248078861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172032, while the sum is 44.

The square root of 248078861 is about 15750.5193882615. The cubic root of 248078861 is about 628.3427181572.

The spelling of 248078861 in words is "two hundred forty-eight million, seventy-eight thousand, eight hundred sixty-one".