87746732917 has 8 divisors (see below), whose sum is σ = 87914729624. Its totient is φ = 87578869248.

The previous prime is 87746732911. The next prime is 87746732921. The reversal of 87746732917 is 71923764778.

It can be written as a sum of positive squares in 4 ways, for example, as 15765062481 + 71981670436 = 125559^2 + 268294^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87746732917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87746732911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340953 + ... + 1404865.

It is an arithmetic number, because the mean of its divisors is an integer number (10989341203).

Almost surely, 2^87746732917 is an apocalyptic number.

It is an amenable number.

87746732917 is a deficient number, since it is larger than the sum of its proper divisors (167996707).

87746732917 is a wasteful number, since it uses less digits than its factorization.

87746732917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66519.

The product of its digits is 24893568, while the sum is 61.

The spelling of 87746732917 in words is "eighty-seven billion, seven hundred forty-six million, seven hundred thirty-two thousand, nine hundred seventeen".