87861183 has 4 divisors (see below), whose sum is σ = 117148248. Its totient is φ = 58574120.

The previous prime is 87861157. The next prime is 87861197. The reversal of 87861183 is 38116878.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87861183 - 2¹² = 87857087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87861133) 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, 14643528 + ... + 14643533.

It is an arithmetic number, because the mean of its divisors is an integer number (29287062).

Almost surely, 2^87861183 is an apocalyptic number.

87861183 is a deficient number, since it is larger than the sum of its proper divisors (29287065).

87861183 is a wasteful number, since it uses less digits than its factorization.

87861183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29287064.

The product of its digits is 64512, while the sum is 42.

The square root of 87861183 is about 9373.4296284764. The cubic root of 87861183 is about 444.5620115065.

The spelling of 87861183 in words is "eighty-seven million, eight hundred sixty-one thousand, one hundred eighty-three".