248978777 has 2 divisors, whose sum is σ = 248978778. Its totient is φ = 248978776.

The previous prime is 248978711. The next prime is 248978783. The reversal of 248978777 is 777879842.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248976841 + 1936 = 15779^2 + 44^2 .

It is a cyclic number.

It is not a de Polignac number, because 248978777 - 2²⁶ = 181869913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (248978077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124489388 + 124489389.

It is an arithmetic number, because the mean of its divisors is an integer number (124489389).

Almost surely, 2^248978777 is an apocalyptic number.

It is an amenable number.

248978777 is a deficient number, since it is larger than the sum of its proper divisors (1).

248978777 is an equidigital number, since it uses as much as digits as its factorization.

248978777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 59.

The square root of 248978777 is about 15779.0613472412. The cubic root of 248978777 is about 629.1015807493.

The spelling of 248978777 in words is "two hundred forty-eight million, nine hundred seventy-eight thousand, seven hundred seventy-seven".