87863155 has 4 divisors (see below), whose sum is σ = 105435792. Its totient is φ = 70290520.

The previous prime is 87863137. The next prime is 87863159. The reversal of 87863155 is 55136878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55136878 = 2 ⋅27568439.

It is a de Polignac number, because none of the positive numbers 2^k-87863155 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87863159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8786311 + ... + 8786320.

It is an arithmetic number, because the mean of its divisors is an integer number (26358948).

Almost surely, 2^87863155 is an apocalyptic number.

87863155 is a deficient number, since it is larger than the sum of its proper divisors (17572637).

87863155 is a wasteful number, since it uses less digits than its factorization.

87863155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17572636.

The product of its digits is 201600, while the sum is 43.

The square root of 87863155 is about 9373.5348188397. The cubic root of 87863155 is about 444.5653374718.

The spelling of 87863155 in words is "eighty-seven million, eight hundred sixty-three thousand, one hundred fifty-five".