197509023 has 10 divisors (see below), whose sum is σ = 295044464. Its totient is φ = 131672628.

The previous prime is 197509021. The next prime is 197509031. The reversal of 197509023 is 320905791.

It is not a de Polignac number, because 197509023 - 2¹ = 197509021 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 (197509021) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1219111 + ... + 1219272.

Almost surely, 2^197509023 is an apocalyptic number.

197509023 is a deficient number, since it is larger than the sum of its proper divisors (97535441).

197509023 is an equidigital number, since it uses as much as digits as its factorization.

197509023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2438395 (or 2438386 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 197509023 is about 14053.7903428221. The cubic root of 197509023 is about 582.3655106508.

The spelling of 197509023 in words is "one hundred ninety-seven million, five hundred nine thousand, twenty-three".