197418385 has 16 divisors (see below), whose sum is σ = 245048832. Its totient is φ = 152524800.

The previous prime is 197418383. The next prime is 197418401. The reversal of 197418385 is 583814791.

It is a happy number.

197418385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

197418385 is a nontrivial binomial coefficient, being equal to C(19871, 2).

It is not a de Polignac number, because 197418385 - 2¹ = 197418383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197418383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98362 + ... + 100348.

It is an arithmetic number, because the mean of its divisors is an integer number (15315552).

Almost surely, 2^197418385 is an apocalyptic number.

197418385 is the 19870-th triangular number.

197418385 is the 6624-th centered nonagonal number.

It is an amenable number.

197418385 is a deficient number, since it is larger than the sum of its proper divisors (47630447).

197418385 is a wasteful number, since it uses less digits than its factorization.

197418385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664.

The product of its digits is 241920, while the sum is 46.

The square root of 197418385 is about 14050.5652911191. The cubic root of 197418385 is about 582.2764134190.

The spelling of 197418385 in words is "one hundred ninety-seven million, four hundred eighteen thousand, three hundred eighty-five".