209179093 has 12 divisors (see below), whose sum is σ = 219627072. Its totient is φ = 199134000.

The previous prime is 209179079. The next prime is 209179111. The reversal of 209179093 is 390971902.

It is a de Polignac number, because none of the positive numbers 2^k-209179093 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 (209179063) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 62718 + ... + 65968.

It is an arithmetic number, because the mean of its divisors is an integer number (18302256).

Almost surely, 2^209179093 is an apocalyptic number.

It is an amenable number.

209179093 is a deficient number, since it is larger than the sum of its proper divisors (10447979).

209179093 is an equidigital number, since it uses as much as digits as its factorization.

209179093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3372 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 209179093 is about 14463.0250293637. The cubic root of 209179093 is about 593.6166748031.

The spelling of 209179093 in words is "two hundred nine million, one hundred seventy-nine thousand, ninety-three".