247938843 has 6 divisors (see below), whose sum is σ = 330621492. Its totient is φ = 165274380.

The previous prime is 247938833. The next prime is 247938851. The reversal of 247938843 is 348839742.

It is not a de Polignac number, because 247938843 - 2¹² = 247934747 is a prime.

It is a super-2 number, since 2×247938843² = 122947339736357298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247938792 and 247938801.

It is not an unprimeable number, because it can be changed into a prime (247938833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22728 + ... + 31818.

It is an arithmetic number, because the mean of its divisors is an integer number (55103582).

Almost surely, 2^247938843 is an apocalyptic number.

247938843 is a deficient number, since it is larger than the sum of its proper divisors (82682649).

247938843 is an frugal number, since it uses more digits than its factorization.

247938843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18185 (or 9094 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 247938843 is about 15746.0738916087. The cubic root of 247938843 is about 628.2244817657.

Multiplying 247938843 by its sum of digits (48), we get a square (11901064464 = 109092²).

The spelling of 247938843 in words is "two hundred forty-seven million, nine hundred thirty-eight thousand, eight hundred forty-three".