87375821 has 8 divisors (see below), whose sum is σ = 94817184. Its totient is φ = 80037360.

The previous prime is 87375809. The next prime is 87375857. The reversal of 87375821 is 12857378.

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

It is not a de Polignac number, because 87375821 - 2²⁶ = 20266957 is a prime.

It is a super-4 number, since 4×87375821⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87375881) 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 7 ways as a sum of consecutive naturals, for example, 23951 + ... + 27356.

It is an arithmetic number, because the mean of its divisors is an integer number (11852148).

Almost surely, 2^87375821 is an apocalyptic number.

It is an amenable number.

87375821 is a deficient number, since it is larger than the sum of its proper divisors (7441363).

87375821 is a wasteful number, since it uses less digits than its factorization.

87375821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51451.

The product of its digits is 94080, while the sum is 41.

The square root of 87375821 is about 9347.5034634923. The cubic root of 87375821 is about 443.7418842396.

The spelling of 87375821 in words is "eighty-seven million, three hundred seventy-five thousand, eight hundred twenty-one".