209140594 has 8 divisors (see below), whose sum is σ = 337842540. Its totient is φ = 96526416.

The previous prime is 209140531. The next prime is 209140609. The reversal of 209140594 is 495041902.

It can be written as a sum of positive squares in 2 ways, for example, as 205549569 + 3591025 = 14337^2 + 1895^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4021909 + ... + 4021960.

Almost surely, 2^209140594 is an apocalyptic number.

209140594 is a deficient number, since it is larger than the sum of its proper divisors (128701946).

209140594 is a wasteful number, since it uses less digits than its factorization.

209140594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8043884.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 209140594 is about 14461.6940224857. The cubic root of 209140594 is about 593.5802545754.

The spelling of 209140594 in words is "two hundred nine million, one hundred forty thousand, five hundred ninety-four".