197146109 has 8 divisors (see below), whose sum is σ = 209463840. Its totient is φ = 185022576.

The previous prime is 197146097. The next prime is 197146111. The reversal of 197146109 is 901641791.

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

It is a cyclic number.

It is not a de Polignac number, because 197146109 - 2⁸ = 197145853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197146139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46454 + ... + 50519.

It is an arithmetic number, because the mean of its divisors is an integer number (26182980).

Almost surely, 2^197146109 is an apocalyptic number.

197146109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

197146109 is a deficient number, since it is larger than the sum of its proper divisors (12317731).

197146109 is a wasteful number, since it uses less digits than its factorization.

197146109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97099.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 197146109 is about 14040.8728005064. The cubic root of 197146109 is about 582.0086017631.

The spelling of 197146109 in words is "one hundred ninety-seven million, one hundred forty-six thousand, one hundred nine".