197992345 has 8 divisors (see below), whose sum is σ = 238578120. Its totient is φ = 157735680.

The previous prime is 197992297. The next prime is 197992363. The reversal of 197992345 is 543299791.

It can be written as a sum of positive squares in 4 ways, for example, as 1628176 + 196364169 = 1276^2 + 14013^2 .

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

It is not a de Polignac number, because 197992345 - 2¹³ = 197984153 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80950 + ... + 83359.

It is an arithmetic number, because the mean of its divisors is an integer number (29822265).

Almost surely, 2^197992345 is an apocalyptic number.

It is an amenable number.

197992345 is a deficient number, since it is larger than the sum of its proper divisors (40585775).

197992345 is a wasteful number, since it uses less digits than its factorization.

197992345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164555.

The product of its digits is 612360, while the sum is 49.

The square root of 197992345 is about 14070.9752682605. The cubic root of 197992345 is about 582.8401569507.

The spelling of 197992345 in words is "one hundred ninety-seven million, nine hundred ninety-two thousand, three hundred forty-five".