87760765 has 4 divisors (see below), whose sum is σ = 105312924. Its totient is φ = 70208608.

The previous prime is 87760763. The next prime is 87760769. The reversal of 87760765 is 56706778.

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 29833444 + 57927321 = 5462^2 + 7611^2 .

It is a cyclic number.

It is not a de Polignac number, because 87760765 - 2¹ = 87760763 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 (87760763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8776072 + ... + 8776081.

It is an arithmetic number, because the mean of its divisors is an integer number (26328231).

Almost surely, 2^87760765 is an apocalyptic number.

It is an amenable number.

87760765 is a deficient number, since it is larger than the sum of its proper divisors (17552159).

87760765 is a wasteful number, since it uses less digits than its factorization.

87760765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17552158.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 87760765 is about 9368.0715731681. The cubic root of 87760765 is about 444.3925811820.

The spelling of 87760765 in words is "eighty-seven million, seven hundred sixty thousand, seven hundred sixty-five".