209245953 has 16 divisors (see below), whose sum is σ = 319824896. Its totient is φ = 119203920.

The previous prime is 209245943. The next prime is 209245969. The reversal of 209245953 is 359542902.

It is not a de Polignac number, because 209245953 - 2⁴ = 209245937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209245903) 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 15 ways as a sum of consecutive naturals, for example, 8101 + ... + 22002.

It is an arithmetic number, because the mean of its divisors is an integer number (19989056).

Almost surely, 2^209245953 is an apocalyptic number.

It is an amenable number.

209245953 is a deficient number, since it is larger than the sum of its proper divisors (110578943).

209245953 is a wasteful number, since it uses less digits than its factorization.

209245953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30444.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 209245953 is about 14465.3362560294. The cubic root of 209245953 is about 593.6799140469.

The spelling of 209245953 in words is "two hundred nine million, two hundred forty-five thousand, nine hundred fifty-three".