209007145 has 8 divisors (see below), whose sum is σ = 251038656. Its totient is φ = 167052336.

The previous prime is 209007131. The next prime is 209007151. The reversal of 209007145 is 541700902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 209007145 - 2⁷ = 209007017 is a prime.

It is a super-2 number, since 2×209007145² = 87367973322102050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 12997 + ... + 24226.

It is an arithmetic number, because the mean of its divisors is an integer number (31379832).

Almost surely, 2^209007145 is an apocalyptic number.

It is an amenable number.

209007145 is a deficient number, since it is larger than the sum of its proper divisors (42031511).

209007145 is a wasteful number, since it uses less digits than its factorization.

209007145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38351.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 209007145 is about 14457.0794076812. The cubic root of 209007145 is about 593.4539766110.

The spelling of 209007145 in words is "two hundred nine million, seven thousand, one hundred forty-five".