10197994187 has 4 divisors (see below), whose sum is σ = 10797876216. Its totient is φ = 9598112160.

The previous prime is 10197994141. The next prime is 10197994201. The reversal of 10197994187 is 78149979101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78149979101 = 71 ⋅1100703931.

It is a cyclic number.

It is not a de Polignac number, because 10197994187 - 2⁶ = 10197994123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10197994087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299940989 + ... + 299941022.

It is an arithmetic number, because the mean of its divisors is an integer number (2699469054).

Almost surely, 2^10197994187 is an apocalyptic number.

10197994187 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

10197994187 is a deficient number, since it is larger than the sum of its proper divisors (599882029).

10197994187 is an equidigital number, since it uses as much as digits as its factorization.

10197994187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599882028.

The product of its (nonzero) digits is 1143072, while the sum is 56.

The spelling of 10197994187 in words is "ten billion, one hundred ninety-seven million, nine hundred ninety-four thousand, one hundred eighty-seven".