87347717 has 4 divisors (see below), whose sum is σ = 92485836. Its totient is φ = 82209600.

The previous prime is 87347651. The next prime is 87347719. The reversal of 87347717 is 71774378.

It is a Cunningham number, because it is equal to 9346²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67996516 + 19351201 = 8246^2 + 4399^2 .

It is a cyclic number.

It is not a de Polignac number, because 87347717 - 2²⁰ = 86299141 is a prime.

It is a super-2 number, since 2×87347717² = 15259247330224178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87347719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2569034 + ... + 2569067.

It is an arithmetic number, because the mean of its divisors is an integer number (23121459).

Almost surely, 2^87347717 is an apocalyptic number.

It is an amenable number.

87347717 is a deficient number, since it is larger than the sum of its proper divisors (5138119).

87347717 is a wasteful number, since it uses less digits than its factorization.

87347717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5138118.

The product of its digits is 230496, while the sum is 44.

The square root of 87347717 is about 9346.0000534988. Note that the first 4 decimals coincide. The cubic root of 87347717 is about 443.6943033449.

The spelling of 87347717 in words is "eighty-seven million, three hundred forty-seven thousand, seven hundred seventeen".