197091210 has 64 divisors (see below), whose sum is σ = 487752192. Its totient is φ = 50942976.

The previous prime is 197091197. The next prime is 197091233. The reversal of 197091210 is 12190791.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158712 + ... + 159948.

It is an arithmetic number, because the mean of its divisors is an integer number (7621128).

Almost surely, 2^197091210 is an apocalyptic number.

197091210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 197091210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243876096).

197091210 is an abundant number, since it is smaller than the sum of its proper divisors (290660982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

197091210 is a wasteful number, since it uses less digits than its factorization.

197091210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407.

The product of its (nonzero) digits is 1134, while the sum is 30.

The square root of 197091210 is about 14038.9176933266. The cubic root of 197091210 is about 581.9545730418.

The spelling of 197091210 in words is "one hundred ninety-seven million, ninety-one thousand, two hundred ten".