247931472349 has 4 divisors (see below), whose sum is σ = 270470697120. Its totient is φ = 225392247580.

The previous prime is 247931472331. The next prime is 247931472407. The reversal of 247931472349 is 943274139742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 247931472349 - 2¹¹ = 247931470301 is a prime.

It is a super-2 number, since 2×247931472349² (a number of 24 digits) 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 247931472349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247931472149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11269612369 + ... + 11269612390.

It is an arithmetic number, because the mean of its divisors is an integer number (67617674280).

Almost surely, 2^247931472349 is an apocalyptic number.

It is an amenable number.

247931472349 is a deficient number, since it is larger than the sum of its proper divisors (22539224771).

247931472349 is a wasteful number, since it uses less digits than its factorization.

247931472349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22539224770.

The product of its digits is 9144576, while the sum is 55.

The spelling of 247931472349 in words is "two hundred forty-seven billion, nine hundred thirty-one million, four hundred seventy-two thousand, three hundred forty-nine".