87647801 has 4 divisors (see below), whose sum is σ = 92803572. Its totient is φ = 82492032.

The previous prime is 87647797. The next prime is 87647827. The reversal of 87647801 is 10874678.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10874678 = 2 ⋅5437339.

It can be written as a sum of positive squares in 2 ways, for example, as 33640000 + 54007801 = 5800^2 + 7349^2 .

It is a cyclic number.

It is not a de Polignac number, because 87647801 - 2² = 87647797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87647851) 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, 2577860 + ... + 2577893.

It is an arithmetic number, because the mean of its divisors is an integer number (23200893).

Almost surely, 2^87647801 is an apocalyptic number.

It is an amenable number.

87647801 is a deficient number, since it is larger than the sum of its proper divisors (5155771).

87647801 is a wasteful number, since it uses less digits than its factorization.

87647801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155770.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 87647801 is about 9362.0404293081. The cubic root of 87647801 is about 444.2018280668.

The spelling of 87647801 in words is "eighty-seven million, six hundred forty-seven thousand, eight hundred one".