209125973 has 12 divisors (see below), whose sum is σ = 243536832. Its totient is φ = 179053560.

The previous prime is 209125949. The next prime is 209126017. The reversal of 209125973 is 379521902.

It is not a de Polignac number, because 209125973 - 2⁶ = 209125909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209125573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58586 + ... + 62052.

It is an arithmetic number, because the mean of its divisors is an integer number (20294736).

Almost surely, 2^209125973 is an apocalyptic number.

It is an amenable number.

209125973 is a deficient number, since it is larger than the sum of its proper divisors (34410859).

209125973 is a wasteful number, since it uses less digits than its factorization.

209125973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4712 (or 4705 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 209125973 is about 14461.1885057902. The cubic root of 209125973 is about 593.5664218724.

The spelling of 209125973 in words is "two hundred nine million, one hundred twenty-five thousand, nine hundred seventy-three".