108221787 has 6 divisors (see below), whose sum is σ = 156320372. Its totient is φ = 72147852.

The previous prime is 108221783. The next prime is 108221857. The reversal of 108221787 is 787122801.

It is a happy number.

It is not a de Polignac number, because 108221787 - 2² = 108221783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108221783) 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, 6012313 + ... + 6012330.

Almost surely, 2^108221787 is an apocalyptic number.

108221787 is a deficient number, since it is larger than the sum of its proper divisors (48098585).

108221787 is a wasteful number, since it uses less digits than its factorization.

108221787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12024649 (or 12024646 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 108221787 is about 10402.9701047345. The cubic root of 108221787 is about 476.5460787326.

The spelling of 108221787 in words is "one hundred eight million, two hundred twenty-one thousand, seven hundred eighty-seven".