209560001 has 4 divisors (see below), whose sum is σ = 239497152. Its totient is φ = 179622852.

The previous prime is 209559991. The next prime is 209560009. The reversal of 209560001 is 100065902.

209560001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 209560001 - 2¹⁸ = 209297857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209560009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14968565 + ... + 14968578.

It is an arithmetic number, because the mean of its divisors is an integer number (59874288).

Almost surely, 2^209560001 is an apocalyptic number.

It is an amenable number.

209560001 is a deficient number, since it is larger than the sum of its proper divisors (29937151).

209560001 is an equidigital number, since it uses as much as digits as its factorization.

209560001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29937150.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 209560001 is about 14476.1873778975. The cubic root of 209560001 is about 593.9767748933.

The spelling of 209560001 in words is "two hundred nine million, five hundred sixty thousand, one".