197643345 has 16 divisors (see below), whose sum is σ = 316504320. Its totient is φ = 105318144.

The previous prime is 197643337. The next prime is 197643349. The reversal of 197643345 is 543346791.

It is not a de Polignac number, because 197643345 - 2³ = 197643337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 197643297 and 197643306.

It is not an unprimeable number, because it can be changed into a prime (197643349) 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, 14376 + ... + 24534.

It is an arithmetic number, because the mean of its divisors is an integer number (19781520).

Almost surely, 2^197643345 is an apocalyptic number.

197643345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197643345 is a deficient number, since it is larger than the sum of its proper divisors (118860975).

197643345 is a wasteful number, since it uses less digits than its factorization.

197643345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11464.

The product of its digits is 272160, while the sum is 42.

The square root of 197643345 is about 14058.5683837295. The cubic root of 197643345 is about 582.4974991757.

The spelling of 197643345 in words is "one hundred ninety-seven million, six hundred forty-three thousand, three hundred forty-five".