197988375409 has 16 divisors (see below), whose sum is σ = 227723705280. Its totient is φ = 170239829760.

The previous prime is 197988375337. The next prime is 197988375419. The reversal of 197988375409 is 904573889791.

197988375409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 197988375409 - 2⁹ = 197988374897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197988375419) 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 15 ways as a sum of consecutive naturals, for example, 638724 + ... + 896629.

It is an arithmetic number, because the mean of its divisors is an integer number (14232731580).

Almost surely, 2^197988375409 is an apocalyptic number.

197988375409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

197988375409 is a deficient number, since it is larger than the sum of its proper divisors (29735329871).

197988375409 is a wasteful number, since it uses less digits than its factorization.

197988375409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536000.

The product of its (nonzero) digits is 137168640, while the sum is 70.

It can be divided in two parts, 1979 and 88375409, that added together give a palindrome (88377388).

The spelling of 197988375409 in words is "one hundred ninety-seven billion, nine hundred eighty-eight million, three hundred seventy-five thousand, four hundred nine".