247213347 has 8 divisors (see below), whose sum is σ = 330672144. Its totient is φ = 164281728.

The previous prime is 247213333. The next prime is 247213387. The reversal of 247213347 is 743312742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 247213347 - 2⁴ = 247213331 is a prime.

It is a super-2 number, since 2×247213347² = 122228877869884818, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (247213387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130698 + ... + 132575.

It is an arithmetic number, because the mean of its divisors is an integer number (41334018).

Almost surely, 2^247213347 is an apocalyptic number.

247213347 is a deficient number, since it is larger than the sum of its proper divisors (83458797).

247213347 is a wasteful number, since it uses less digits than its factorization.

247213347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263589.

The product of its digits is 28224, while the sum is 33.

The square root of 247213347 is about 15723.0196527257. The cubic root of 247213347 is about 627.6111320977.

The spelling of 247213347 in words is "two hundred forty-seven million, two hundred thirteen thousand, three hundred forty-seven".