87380821 has 8 divisors (see below), whose sum is σ = 96012000. Its totient is φ = 78864240.

The previous prime is 87380807. The next prime is 87380851. The reversal of 87380821 is 12808378.

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 87380821 - 2⁹ = 87380309 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 (87380851) 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, 27046 + ... + 30103.

It is an arithmetic number, because the mean of its divisors is an integer number (12001500).

Almost surely, 2^87380821 is an apocalyptic number.

It is an amenable number.

87380821 is a deficient number, since it is larger than the sum of its proper divisors (8631179).

87380821 is a wasteful number, since it uses less digits than its factorization.

87380821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57299.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 87380821 is about 9347.7709107573. The cubic root of 87380821 is about 443.7503483169.

The spelling of 87380821 in words is "eighty-seven million, three hundred eighty thousand, eight hundred twenty-one".