87676565 has 8 divisors (see below), whose sum is σ = 111400920. Its totient is φ = 66015232.

The previous prime is 87676499. The next prime is 87676571. The reversal of 87676565 is 56567678.

It is a happy number.

87676565 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 4 ways, for example, as 13147876 + 74528689 = 3626^2 + 8633^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87676565 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515660 + ... + 515829.

It is an arithmetic number, because the mean of its divisors is an integer number (13925115).

Almost surely, 2^87676565 is an apocalyptic number.

87676565 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87676565 is a deficient number, since it is larger than the sum of its proper divisors (23724355).

87676565 is a wasteful number, since it uses less digits than its factorization.

87676565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031511.

The product of its digits is 2116800, while the sum is 50.

The square root of 87676565 is about 9363.5765068696. The cubic root of 87676565 is about 444.2504150395.

The spelling of 87676565 in words is "eighty-seven million, six hundred seventy-six thousand, five hundred sixty-five".