10187993 has 4 divisors (see below), whose sum is σ = 10204068. Its totient is φ = 10171920.

The previous prime is 10187963. The next prime is 10187999. The reversal of 10187993 is 39978101.

10187993 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39978101 = 17 ⋅2351653.

It can be written as a sum of positive squares in 2 ways, for example, as 8479744 + 1708249 = 2912^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 10187993 - 2⁶ = 10187929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10187999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7046 + ... + 8367.

It is an arithmetic number, because the mean of its divisors is an integer number (2551017).

Almost surely, 2^10187993 is an apocalyptic number.

It is an amenable number.

10187993 is a deficient number, since it is larger than the sum of its proper divisors (16075).

10187993 is an equidigital number, since it uses as much as digits as its factorization.

10187993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16074.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 10187993 is about 3191.8635622470. The cubic root of 10187993 is about 216.7851583296.

The spelling of 10187993 in words is "ten million, one hundred eighty-seven thousand, nine hundred ninety-three".