197816385 has 32 divisors (see below), whose sum is σ = 341550720. Its totient is φ = 97187328.

The previous prime is 197816347. The next prime is 197816407. The reversal of 197816385 is 583618791.

It is not a de Polignac number, because 197816385 - 2⁷ = 197816257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152821 + ... + 154109.

It is an arithmetic number, because the mean of its divisors is an integer number (10673460).

Almost surely, 2^197816385 is an apocalyptic number.

197816385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197816385 is a deficient number, since it is larger than the sum of its proper divisors (143734335).

197816385 is a wasteful number, since it uses less digits than its factorization.

197816385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097.

The product of its digits is 362880, while the sum is 48.

The square root of 197816385 is about 14064.7212912308. The cubic root of 197816385 is about 582.6674449697.

The spelling of 197816385 in words is "one hundred ninety-seven million, eight hundred sixteen thousand, three hundred eighty-five".