87821102 has 4 divisors (see below), whose sum is σ = 131731656. Its totient is φ = 43910550.

The previous prime is 87821101. The next prime is 87821137. The reversal of 87821102 is 20112878.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87821101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21955274 + ... + 21955277.

It is an arithmetic number, because the mean of its divisors is an integer number (32932914).

Almost surely, 2^87821102 is an apocalyptic number.

87821102 is a deficient number, since it is larger than the sum of its proper divisors (43910554).

87821102 is a wasteful number, since it uses less digits than its factorization.

87821102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43910553.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 87821102 is about 9371.2913731246. The cubic root of 87821102 is about 444.4944003060.

The spelling of 87821102 in words is "eighty-seven million, eight hundred twenty-one thousand, one hundred two".