87647795 has 4 divisors (see below), whose sum is σ = 105177360. Its totient is φ = 70118232.

The previous prime is 87647761. The next prime is 87647797. The reversal of 87647795 is 59774678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59774678 = 2 ⋅29887339.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87647795 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87647797) 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, 8764775 + ... + 8764784.

It is an arithmetic number, because the mean of its divisors is an integer number (26294340).

Almost surely, 2^87647795 is an apocalyptic number.

87647795 is a deficient number, since it is larger than the sum of its proper divisors (17529565).

87647795 is a wasteful number, since it uses less digits than its factorization.

87647795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17529564.

The product of its digits is 2963520, while the sum is 53.

The square root of 87647795 is about 9362.0401088652. The cubic root of 87647795 is about 444.2018179307.

The spelling of 87647795 in words is "eighty-seven million, six hundred forty-seven thousand, seven hundred ninety-five".