247722863 has 2 divisors, whose sum is σ = 247722864. Its totient is φ = 247722862.

The previous prime is 247722859. The next prime is 247722941. The reversal of 247722863 is 368227742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247722863 - 2² = 247722859 is a prime.

It is a super-2 number, since 2×247722863² = 122733233705833538, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247722863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247722803) 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, 123861431 + 123861432.

It is an arithmetic number, because the mean of its divisors is an integer number (123861432).

Almost surely, 2^247722863 is an apocalyptic number.

247722863 is a deficient number, since it is larger than the sum of its proper divisors (1).

247722863 is an equidigital number, since it uses as much as digits as its factorization.

247722863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 41.

The square root of 247722863 is about 15739.2141798757. The cubic root of 247722863 is about 628.0420129235.

The spelling of 247722863 in words is "two hundred forty-seven million, seven hundred twenty-two thousand, eight hundred sixty-three".