209995345 has 16 divisors (see below), whose sum is σ = 289768320. Its totient is φ = 143109504.

The previous prime is 209995343. The next prime is 209995349. The reversal of 209995345 is 543599902.

It is a cyclic number.

It is not a de Polignac number, because 209995345 - 2¹ = 209995343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209995295 and 209995304.

It is not an unprimeable number, because it can be changed into a prime (209995343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12700 + ... + 24109.

It is an arithmetic number, because the mean of its divisors is an integer number (18110520).

Almost surely, 2^209995345 is an apocalyptic number.

It is an amenable number.

209995345 is a deficient number, since it is larger than the sum of its proper divisors (79772975).

209995345 is a wasteful number, since it uses less digits than its factorization.

209995345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36984.

The product of its (nonzero) digits is 437400, while the sum is 46.

The square root of 209995345 is about 14491.2161325404. The cubic root of 209995345 is about 594.3878033460.

The spelling of 209995345 in words is "two hundred nine million, nine hundred ninety-five thousand, three hundred forty-five".