247919563 has 2 divisors, whose sum is σ = 247919564. Its totient is φ = 247919562.

The previous prime is 247919561. The next prime is 247919591. The reversal of 247919563 is 365919742.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247919563 - 2¹ = 247919561 is a prime.

It is a super-2 number, since 2×247919563² = 122928219436221938, which contains 22 as substring.

Together with 247919561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (247919561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123959781 + 123959782.

It is an arithmetic number, because the mean of its divisors is an integer number (123959782).

Almost surely, 2^247919563 is an apocalyptic number.

247919563 is a deficient number, since it is larger than the sum of its proper divisors (1).

247919563 is an equidigital number, since it uses as much as digits as its factorization.

247919563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 247919563 is about 15745.4616636033. The cubic root of 247919563 is about 628.2081975323.

The spelling of 247919563 in words is "two hundred forty-seven million, nine hundred nineteen thousand, five hundred sixty-three".