27123731973 has 12 divisors (see below), whose sum is σ = 42192472140. Its totient is φ = 16691527296.

The previous prime is 27123731867. The next prime is 27123732047. The reversal of 27123731973 is 37913732172.

27123731973 is a `hidden beast` number, since 271 + 2 + 373 + 1 + 9 + 7 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17286464484 + 9837267489 = 131478^2 + 99183^2 .

It is not a de Polignac number, because 27123731973 - 2⁸ = 27123731717 is a prime.

It is a super-2 number, since 2×27123731973² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27123781973) 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, 115913268 + ... + 115913501.

It is an arithmetic number, because the mean of its divisors is an integer number (3516039345).

Almost surely, 2^27123731973 is an apocalyptic number.

It is an amenable number.

27123731973 is a deficient number, since it is larger than the sum of its proper divisors (15068740167).

27123731973 is a wasteful number, since it uses less digits than its factorization.

27123731973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231826788 (or 231826785 counting only the distinct ones).

The product of its digits is 333396, while the sum is 45.

The spelling of 27123731973 in words is "twenty-seven billion, one hundred twenty-three million, seven hundred thirty-one thousand, nine hundred seventy-three".