197343945 has 32 divisors (see below), whose sum is σ = 355184640. Its totient is φ = 105244272.

The previous prime is 197343943. The next prime is 197343953. The reversal of 197343945 is 549343791.

It is not a de Polignac number, because 197343945 - 2¹ = 197343943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 197343945.

It is not an unprimeable number, because it can be changed into a prime (197343943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1912 + ... + 19958.

It is an arithmetic number, because the mean of its divisors is an integer number (11099520).

Almost surely, 2^197343945 is an apocalyptic number.

197343945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197343945 is a deficient number, since it is larger than the sum of its proper divisors (157840695).

197343945 is an frugal number, since it uses more digits than its factorization.

197343945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18073 (or 18055 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 197343945 is about 14047.9160376192. The cubic root of 197343945 is about 582.2032184372.

The spelling of 197343945 in words is "one hundred ninety-seven million, three hundred forty-three thousand, nine hundred forty-five".