197191345 has 32 divisors (see below), whose sum is σ = 265545504. Its totient is φ = 139622400.

The previous prime is 197191339. The next prime is 197191363. The reversal of 197191345 is 543191791.

197191345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 196925089 + 266256 = 14033^2 + 516^2 .

It is not a de Polignac number, because 197191345 - 2¹¹ = 197189297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197191298 and 197191307.

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, 161959 + ... + 163171.

It is an arithmetic number, because the mean of its divisors is an integer number (8298297).

Almost surely, 2^197191345 is an apocalyptic number.

It is an amenable number.

197191345 is a deficient number, since it is larger than the sum of its proper divisors (68354159).

197191345 is a wasteful number, since it uses less digits than its factorization.

197191345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333.

The product of its digits is 34020, while the sum is 40.

The square root of 197191345 is about 14042.4835766327. The cubic root of 197191345 is about 582.0531131289.

The spelling of 197191345 in words is "one hundred ninety-seven million, one hundred ninety-one thousand, three hundred forty-five".