87786117 has 12 divisors (see below), whose sum is σ = 127988640. Its totient is φ = 57976488.

The previous prime is 87786109. The next prime is 87786119. The reversal of 87786117 is 71168778.

It is a happy number.

It is not a de Polignac number, because 87786117 - 2³ = 87786109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87786119) 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, 44617 + ... + 46542.

It is an arithmetic number, because the mean of its divisors is an integer number (10665720).

Almost surely, 2^87786117 is an apocalyptic number.

It is an amenable number.

87786117 is a deficient number, since it is larger than the sum of its proper divisors (40202523).

87786117 is a wasteful number, since it uses less digits than its factorization.

87786117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91272 (or 91269 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The square root of 87786117 is about 9369.4245821182. The cubic root of 87786117 is about 444.4353685485.

The spelling of 87786117 in words is "eighty-seven million, seven hundred eighty-six thousand, one hundred seventeen".