87921827 has 6 divisors (see below), whose sum is σ = 102276468. Its totient is φ = 75361524.

The previous prime is 87921811. The next prime is 87921839. The reversal of 87921827 is 72812978.

It is not a de Polignac number, because 87921827 - 2⁴ = 87921811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87921527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897113 + ... + 897210.

It is an arithmetic number, because the mean of its divisors is an integer number (17046078).

Almost surely, 2^87921827 is an apocalyptic number.

87921827 is a deficient number, since it is larger than the sum of its proper divisors (14354641).

87921827 is a wasteful number, since it uses less digits than its factorization.

87921827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794337 (or 1794330 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 87921827 is about 9376.6639589995. The cubic root of 87921827 is about 444.6642706129.

The spelling of 87921827 in words is "eighty-seven million, nine hundred twenty-one thousand, eight hundred twenty-seven".