2009351 has 4 divisors (see below), whose sum is σ = 2015112. Its totient is φ = 2003592.

The previous prime is 2009339. The next prime is 2009377. The reversal of 2009351 is 1539002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2009351 - 2¹⁰ = 2008327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2321 + ... + 3066.

It is an arithmetic number, because the mean of its divisors is an integer number (503778).

2^2009351 is an apocalyptic number.

2009351 is a deficient number, since it is larger than the sum of its proper divisors (5761).

2009351 is an equidigital number, since it uses as much as digits as its factorization.

With its predecessor (2009350) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (5760).

2009351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5760.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 2009351 is about 1417.5157847446. The cubic root of 2009351 is about 126.1881584525.

The spelling of 2009351 in words is "two million, nine thousand, three hundred fifty-one".