197323691 has 4 divisors (see below), whose sum is σ = 197431584. Its totient is φ = 197215800.

The previous prime is 197323673. The next prime is 197323699. The reversal of 197323691 is 196323791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197323691 - 2¹⁴ = 197307307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197323699) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 51155 + ... + 54876.

It is an arithmetic number, because the mean of its divisors is an integer number (49357896).

Almost surely, 2^197323691 is an apocalyptic number.

197323691 is a deficient number, since it is larger than the sum of its proper divisors (107893).

197323691 is a wasteful number, since it uses less digits than its factorization.

197323691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107892.

The product of its digits is 61236, while the sum is 41.

The square root of 197323691 is about 14047.1951292776. The cubic root of 197323691 is about 582.1833000025.

The spelling of 197323691 in words is "one hundred ninety-seven million, three hundred twenty-three thousand, six hundred ninety-one".