10187989 has 8 divisors (see below), whose sum is σ = 11716160. Its totient is φ = 8678016.

The previous prime is 10187963. The next prime is 10187999. The reversal of 10187989 is 98978101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10187989 - 2¹³ = 10179797 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 (10187909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3324 + ... + 5605.

It is an arithmetic number, because the mean of its divisors is an integer number (1464520).

Almost surely, 2^10187989 is an apocalyptic number.

It is an amenable number.

10187989 is a deficient number, since it is larger than the sum of its proper divisors (1528171).

10187989 is an equidigital number, since it uses as much as digits as its factorization.

10187989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9099.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 10187989 is about 3191.8629356537. The cubic root of 10187989 is about 216.7851299583.

The spelling of 10187989 in words is "ten million, one hundred eighty-seven thousand, nine hundred eighty-nine".