197668745 has 8 divisors (see below), whose sum is σ = 237565320. Its totient is φ = 157893120.

The previous prime is 197668687. The next prime is 197668759. The reversal of 197668745 is 547866791.

197668745 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 4 ways, for example, as 77810041 + 119858704 = 8821^2 + 10948^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197668745 - 2⁸ = 197668489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26600 + ... + 33209.

It is an arithmetic number, because the mean of its divisors is an integer number (29695665).

Almost surely, 2^197668745 is an apocalyptic number.

It is an amenable number.

197668745 is a deficient number, since it is larger than the sum of its proper divisors (39896575).

197668745 is an equidigital number, since it uses as much as digits as its factorization.

197668745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60475.

The product of its digits is 2540160, while the sum is 53.

The square root of 197668745 is about 14059.4717183826. The cubic root of 197668745 is about 582.5224511968.

The spelling of 197668745 in words is "one hundred ninety-seven million, six hundred sixty-eight thousand, seven hundred forty-five".