87811475273 has 4 divisors (see below), whose sum is σ = 87821966100. Its totient is φ = 87800984448.

The previous prime is 87811475237. The next prime is 87811475281. The reversal of 87811475273 is 37257411878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37257411878 = 2 ⋅18628705939.

It can be written as a sum of positive squares in 2 ways, for example, as 14580079504 + 73231395769 = 120748^2 + 270613^2 .

It is a cyclic number.

It is not a de Polignac number, because 87811475273 - 2¹² = 87811471177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87811475203) 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 3 ways as a sum of consecutive naturals, for example, 5232848 + ... + 5249601.

It is an arithmetic number, because the mean of its divisors is an integer number (21955491525).

Almost surely, 2^87811475273 is an apocalyptic number.

It is an amenable number.

87811475273 is a deficient number, since it is larger than the sum of its proper divisors (10490827).

87811475273 is a wasteful number, since it uses less digits than its factorization.

87811475273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10490826.

The product of its digits is 2634240, while the sum is 53.

The spelling of 87811475273 in words is "eighty-seven billion, eight hundred eleven million, four hundred seventy-five thousand, two hundred seventy-three".