197309423 has 4 divisors (see below), whose sum is σ = 197983128. Its totient is φ = 196635720.

The previous prime is 197309369. The next prime is 197309443. The reversal of 197309423 is 324903791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324903791 = 29 ⋅11203579.

It is a cyclic number.

It is not a de Polignac number, because 197309423 - 2¹⁴ = 197293039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197309443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336413 + ... + 336998.

It is an arithmetic number, because the mean of its divisors is an integer number (49495782).

Almost surely, 2^197309423 is an apocalyptic number.

197309423 is a deficient number, since it is larger than the sum of its proper divisors (673705).

197309423 is an equidigital number, since it uses as much as digits as its factorization.

197309423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673704.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 197309423 is about 14046.6872607031. The cubic root of 197309423 is about 582.1692675744.

The spelling of 197309423 in words is "one hundred ninety-seven million, three hundred nine thousand, four hundred twenty-three".