247345263 has 48 divisors (see below), whose sum is σ = 407665440. Its totient is φ = 143136000.

The previous prime is 247345253. The next prime is 247345277. The reversal of 247345263 is 362543742.

It is not a de Polignac number, because 247345263 - 2¹⁰ = 247344239 is a prime.

It is a super-2 number, since 2×247345263² = 122359358257078338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247345253) 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 in 47 ways as a sum of consecutive naturals, for example, 289545 + ... + 290397.

It is an arithmetic number, because the mean of its divisors is an integer number (8493030).

Almost surely, 2^247345263 is an apocalyptic number.

247345263 is a deficient number, since it is larger than the sum of its proper divisors (160320177).

247345263 is a wasteful number, since it uses less digits than its factorization.

247345263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000 (or 997 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 247345263 is about 15727.2140889606. The cubic root of 247345263 is about 627.7227458505.

The spelling of 247345263 in words is "two hundred forty-seven million, three hundred forty-five thousand, two hundred sixty-three".