197273745 has 16 divisors (see below), whose sum is σ = 350709120. Its totient is φ = 105212592.

The previous prime is 197273743. The next prime is 197273749. The reversal of 197273745 is 547372791.

It is not a de Polignac number, because 197273745 - 2¹ = 197273743 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 197273745.

It is not an unprimeable number, because it can be changed into a prime (197273743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730509 + ... + 730778.

It is an arithmetic number, because the mean of its divisors is an integer number (21919320).

Almost surely, 2^197273745 is an apocalyptic number.

197273745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197273745 is a deficient number, since it is larger than the sum of its proper divisors (153435375).

197273745 is a wasteful number, since it uses less digits than its factorization.

197273745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461301 (or 1461295 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 197273745 is about 14045.4172241340. The cubic root of 197273745 is about 582.1341756751.

The spelling of 197273745 in words is "one hundred ninety-seven million, two hundred seventy-three thousand, seven hundred forty-five".