247279056813 has 12 divisors (see below), whose sum is σ = 357206845788. Its totient is φ = 164840711040.

The previous prime is 247279056763. The next prime is 247279056823. The reversal of 247279056813 is 318650972742.

It is a happy number.

247279056813 is a `hidden beast` number, since 2 + 4 + 7 + 2 + 79 + 0 + 568 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35028116964 + 212250939849 = 187158^2 + 460707^2 .

It is not a de Polignac number, because 247279056813 - 2¹⁶ = 247278991277 is a prime.

It is a super-2 number, since 2×247279056813² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247279056813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247279056823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 867970 + ... + 1117107.

It is an arithmetic number, because the mean of its divisors is an integer number (29767237149).

It is a 1-persistent number, because it is pandigital, but 2⋅247279056813 = 494558113626 is not.

Almost surely, 2^247279056813 is an apocalyptic number.

It is an amenable number.

247279056813 is a deficient number, since it is larger than the sum of its proper divisors (109927788975).

247279056813 is a wasteful number, since it uses less digits than its factorization.

247279056813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998924 (or 1998921 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 247279056813 in words is "two hundred forty-seven billion, two hundred seventy-nine million, fifty-six thousand, eight hundred thirteen".