209982423 has 8 divisors (see below), whose sum is σ = 319973248. Its totient is φ = 119989944.

The previous prime is 209982407. The next prime is 209982427. The reversal of 209982423 is 324289902.

It is a happy number.

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

It is not a de Polignac number, because 209982423 - 2⁴ = 209982407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209982427) 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 7 ways as a sum of consecutive naturals, for example, 4999561 + ... + 4999602.

It is an arithmetic number, because the mean of its divisors is an integer number (39996656).

Almost surely, 2^209982423 is an apocalyptic number.

209982423 is a deficient number, since it is larger than the sum of its proper divisors (109990825).

209982423 is an equidigital number, since it uses as much as digits as its factorization.

209982423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9999173.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 209982423 is about 14490.7702693818. The cubic root of 209982423 is about 594.3756112714.

The spelling of 209982423 in words is "two hundred nine million, nine hundred eighty-two thousand, four hundred twenty-three".