197691043 has 4 divisors (see below), whose sum is σ = 215662968. Its totient is φ = 179719120.

The previous prime is 197691041. The next prime is 197691047. The reversal of 197691043 is 340196791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340196791 = 11 ⋅30926981.

It is a cyclic number.

It is not a de Polignac number, because 197691043 - 2¹ = 197691041 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197690987 and 197691005.

It is not an unprimeable number, because it can be changed into a prime (197691041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8985946 + ... + 8985967.

It is an arithmetic number, because the mean of its divisors is an integer number (53915742).

Almost surely, 2^197691043 is an apocalyptic number.

197691043 is a deficient number, since it is larger than the sum of its proper divisors (17971925).

197691043 is a wasteful number, since it uses less digits than its factorization.

197691043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17971924.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 197691043 is about 14060.2646845641. The cubic root of 197691043 is about 582.5443541659.

The spelling of 197691043 in words is "one hundred ninety-seven million, six hundred ninety-one thousand, forty-three".