87883821 has 12 divisors (see below), whose sum is σ = 127547680. Its totient is φ = 58310280.

The previous prime is 87883819. The next prime is 87883847. The reversal of 87883821 is 12838878.

It is a happy number.

It is not a de Polignac number, because 87883821 - 2¹ = 87883819 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 (87885821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21241 + ... + 25038.

Almost surely, 2^87883821 is an apocalyptic number.

It is an amenable number.

87883821 is a deficient number, since it is larger than the sum of its proper divisors (39663859).

87883821 is a wasteful number, since it uses less digits than its factorization.

87883821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46496 (or 46493 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 87883821 is about 9374.6371129767. The cubic root of 87883821 is about 444.6001896501.

The spelling of 87883821 in words is "eighty-seven million, eight hundred eighty-three thousand, eight hundred twenty-one".