87656765 has 8 divisors (see below), whose sum is σ = 120215040. Its totient is φ = 60107472.

The previous prime is 87656759. The next prime is 87656771. The reversal of 87656765 is 56765678.

It is a happy number.

87656765 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (87656759) and next prime (87656771).

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

It is a cyclic number.

It is not a de Polignac number, because 87656765 - 2⁸ = 87656509 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, 1252205 + ... + 1252274.

It is an arithmetic number, because the mean of its divisors is an integer number (15026880).

Almost surely, 2^87656765 is an apocalyptic number.

It is an amenable number.

87656765 is a deficient number, since it is larger than the sum of its proper divisors (32558275).

87656765 is a wasteful number, since it uses less digits than its factorization.

87656765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504491.

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

The square root of 87656765 is about 9362.5191588589. The cubic root of 87656765 is about 444.2169708291.

The spelling of 87656765 in words is "eighty-seven million, six hundred fifty-six thousand, seven hundred sixty-five".