247968311 has 2 divisors, whose sum is σ = 247968312. Its totient is φ = 247968310.

The previous prime is 247968293. The next prime is 247968323. The reversal of 247968311 is 113869742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247968311 - 2⁶ = 247968247 is a prime.

It is a super-2 number, since 2×247968311² = 122976566520385442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247968361) 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, 123984155 + 123984156.

It is an arithmetic number, because the mean of its divisors is an integer number (123984156).

Almost surely, 2^247968311 is an apocalyptic number.

247968311 is a deficient number, since it is larger than the sum of its proper divisors (1).

247968311 is an equidigital number, since it uses as much as digits as its factorization.

247968311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 247968311 is about 15747.0095891252. The cubic root of 247968311 is about 628.2493693353.

The spelling of 247968311 in words is "two hundred forty-seven million, nine hundred sixty-eight thousand, three hundred eleven".