947137387681 has 16 divisors (see below), whose sum is σ = 969706907008. Its totient is φ = 924803568000.

The previous prime is 947137387639. The next prime is 947137387723. The reversal of 947137387681 is 186783731749.

It is an interprime number because it is at equal distance from previous prime (947137387639) and next prime (947137387723).

It is a cyclic number.

It is not a de Polignac number, because 947137387681 - 2⁹ = 947137387169 is a prime.

It is a super-2 number, since 2×947137387681² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (947137387081) 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 15 ways as a sum of consecutive naturals, for example, 13625245 + ... + 13694581.

It is an arithmetic number, because the mean of its divisors is an integer number (60606681688).

Almost surely, 2^947137387681 is an apocalyptic number.

It is an amenable number.

947137387681 is a deficient number, since it is larger than the sum of its proper divisors (22569519327).

947137387681 is a wasteful number, since it uses less digits than its factorization.

947137387681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71032.

The product of its digits is 42674688, while the sum is 64.

The spelling of 947137387681 in words is "nine hundred forty-seven billion, one hundred thirty-seven million, three hundred eighty-seven thousand, six hundred eighty-one".