247130643 has 4 divisors (see below), whose sum is σ = 329507528. Its totient is φ = 164753760.

The previous prime is 247130641. The next prime is 247130647. The reversal of 247130643 is 346031742.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 247130643 - 2¹ = 247130641 is a prime.

It is a super-2 number, since 2×247130643² = 122147109419186898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 247130643.

It is not an unprimeable number, because it can be changed into a prime (247130641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41188438 + ... + 41188443.

It is an arithmetic number, because the mean of its divisors is an integer number (82376882).

Almost surely, 2^247130643 is an apocalyptic number.

247130643 is a deficient number, since it is larger than the sum of its proper divisors (82376885).

247130643 is an equidigital number, since it uses as much as digits as its factorization.

247130643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82376884.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 247130643 is about 15720.3894035739. The cubic root of 247130643 is about 627.5411362269.

The spelling of 247130643 in words is "two hundred forty-seven million, one hundred thirty thousand, six hundred forty-three".