87817020233 has 4 divisors (see below), whose sum is σ = 89685467520. Its totient is φ = 85948572948.

The previous prime is 87817020191. The next prime is 87817020251. The reversal of 87817020233 is 33202071878.

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.

It is a cyclic number.

It is not a de Polignac number, because 87817020233 - 2¹⁶ = 87816954697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87817020253) 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, 934223573 + ... + 934223666.

It is an arithmetic number, because the mean of its divisors is an integer number (22421366880).

Almost surely, 2^87817020233 is an apocalyptic number.

It is an amenable number.

87817020233 is a deficient number, since it is larger than the sum of its proper divisors (1868447287).

87817020233 is a wasteful number, since it uses less digits than its factorization.

87817020233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868447286.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 87817020233 in words is "eighty-seven billion, eight hundred seventeen million, twenty thousand, two hundred thirty-three".