87771365 has 16 divisors (see below), whose sum is σ = 117706176. Its totient is φ = 62275200.

The previous prime is 87771337. The next prime is 87771367. The reversal of 87771365 is 56317778.

It is not a de Polignac number, because 87771365 - 2⁸ = 87771109 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 (87771367) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17207 + ... + 21716.

It is an arithmetic number, because the mean of its divisors is an integer number (7356636).

Almost surely, 2^87771365 is an apocalyptic number.

It is an amenable number.

87771365 is a deficient number, since it is larger than the sum of its proper divisors (29934811).

87771365 is a wasteful number, since it uses less digits than its factorization.

87771365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38980.

The product of its digits is 246960, while the sum is 44.

The square root of 87771365 is about 9368.6373075277. The cubic root of 87771365 is about 444.4104721371.

It can be divided in two parts, 877713 and 65, that added together give a palindrome (877778).

The spelling of 87771365 in words is "eighty-seven million, seven hundred seventy-one thousand, three hundred sixty-five".