947247387831 has 24 divisors (see below), whose sum is σ = 1379753060400. Its totient is φ = 626201715456.

The previous prime is 947247387811. The next prime is 947247387833. The reversal of 947247387831 is 138783742749.

947247387831 is a `hidden beast` number, since 9 + 4 + 7 + 2 + 473 + 87 + 83 + 1 = 666.

It is not a de Polignac number, because 947247387831 - 2⁵ = 947247387799 is a prime.

It is a super-2 number, since 2×947247387831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947247387833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199620 + ... + 1390806.

It is an arithmetic number, because the mean of its divisors is an integer number (57489710850).

Almost surely, 2^947247387831 is an apocalyptic number.

947247387831 is a deficient number, since it is larger than the sum of its proper divisors (432505672569).

947247387831 is a wasteful number, since it uses less digits than its factorization.

947247387831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191935 (or 1191932 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 63.

The spelling of 947247387831 in words is "nine hundred forty-seven billion, two hundred forty-seven million, three hundred eighty-seven thousand, eight hundred thirty-one".