9920187 has 6 divisors (see below), whose sum is σ = 14329172. Its totient is φ = 6613452.

The previous prime is 9920177. The next prime is 9920203. The reversal of 9920187 is 7810299.

It is a happy number.

It is not a de Polignac number, because 9920187 - 2⁶ = 9920123 is a prime.

It is a super-2 number, since 2×9920187² = 196820220229938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9920137) 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, 551113 + ... + 551130.

Almost surely, 2^9920187 is an apocalyptic number.

9920187 is a deficient number, since it is larger than the sum of its proper divisors (4408985).

9920187 is a wasteful number, since it uses less digits than its factorization.

9920187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102249 (or 1102246 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 9920187 is about 3149.6328357445. The cubic root of 9920187 is about 214.8687643307.

The spelling of 9920187 in words is "nine million, nine hundred twenty thousand, one hundred eighty-seven".