87715385 has 8 divisors (see below), whose sum is σ = 105669576. Its totient is φ = 69898240.

The previous prime is 87715379. The next prime is 87715387. The reversal of 87715385 is 58351778.

It can be written as a sum of positive squares in 4 ways, for example, as 8202496 + 79512889 = 2864^2 + 8917^2 .

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

It is not a de Polignac number, because 87715385 - 2⁶ = 87715321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87715387) 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, 32846 + ... + 35415.

It is an arithmetic number, because the mean of its divisors is an integer number (13208697).

Almost surely, 2^87715385 is an apocalyptic number.

It is an amenable number.

87715385 is a deficient number, since it is larger than the sum of its proper divisors (17954191).

87715385 is a wasteful number, since it uses less digits than its factorization.

87715385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68523.

The product of its digits is 235200, while the sum is 44.

The square root of 87715385 is about 9365.6492033388. The cubic root of 87715385 is about 444.3159713504.

The spelling of 87715385 in words is "eighty-seven million, seven hundred fifteen thousand, three hundred eighty-five".