87655297 has 4 divisors (see below), whose sum is σ = 89141040. Its totient is φ = 86169556.

The previous prime is 87655291. The next prime is 87655307. The reversal of 87655297 is 79255678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79255678 = 2 ⋅39627839.

It is a cyclic number.

It is not a de Polignac number, because 87655297 - 2³ = 87655289 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87655297.

It is not an unprimeable number, because it can be changed into a prime (87655291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742783 + ... + 742900.

It is an arithmetic number, because the mean of its divisors is an integer number (22285260).

Almost surely, 2^87655297 is an apocalyptic number.

It is an amenable number.

87655297 is a deficient number, since it is larger than the sum of its proper divisors (1485743).

87655297 is a wasteful number, since it uses less digits than its factorization.

87655297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485742.

The product of its digits is 1058400, while the sum is 49.

The square root of 87655297 is about 9362.4407608273. The cubic root of 87655297 is about 444.2144910275.

The spelling of 87655297 in words is "eighty-seven million, six hundred fifty-five thousand, two hundred ninety-seven".