87821383 has 8 divisors (see below), whose sum is σ = 98689248. Its totient is φ = 77541024.

The previous prime is 87821359. The next prime is 87821399. The reversal of 87821383 is 38312878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87821383 - 2¹⁷ = 87690311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87821353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146560 + ... + 147157.

It is an arithmetic number, because the mean of its divisors is an integer number (12336156).

Almost surely, 2^87821383 is an apocalyptic number.

87821383 is a deficient number, since it is larger than the sum of its proper divisors (10867865).

87821383 is a wasteful number, since it uses less digits than its factorization.

87821383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293753.

The product of its digits is 64512, while the sum is 40.

The square root of 87821383 is about 9371.3063657102. The cubic root of 87821383 is about 444.4948743864.

The spelling of 87821383 in words is "eighty-seven million, eight hundred twenty-one thousand, three hundred eighty-three".