2061309 has 8 divisors (see below), whose sum is σ = 2776032. Its totient is φ = 1360400.

The previous prime is 2061289. The next prime is 2061313. The reversal of 2061309 is 9031602.

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 2061309 - 2⁵ = 2061277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3099 + ... + 3704.

It is an arithmetic number, because the mean of its divisors is an integer number (347004).

2^2061309 is an apocalyptic number.

It is an amenable number.

2061309 is a deficient number, since it is larger than the sum of its proper divisors (714723).

2061309 is a wasteful number, since it uses less digits than its factorization.

2061309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6907.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2061309 is about 1435.7259487799. The cubic root of 2061309 is about 127.2665779187.

The spelling of 2061309 in words is "two million, sixty-one thousand, three hundred nine".