2011942309 has 8 divisors (see below), whose sum is σ = 2241421560. Its totient is φ = 1793136576.

The previous prime is 2011942307. The next prime is 2011942313. The reversal of 2011942309 is 9032491102.

It can be written as a sum of positive squares in 4 ways, for example, as 324540225 + 1687402084 = 18015^2 + 41078^2 .

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 2011942309 - 2¹ = 2011942307 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 (2011942307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2667982 + ... + 2668735.

It is an arithmetic number, because the mean of its divisors is an integer number (280177695).

Almost surely, 2^2011942309 is an apocalyptic number.

2011942309 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2011942309 is a deficient number, since it is larger than the sum of its proper divisors (229479251).

2011942309 is a wasteful number, since it uses less digits than its factorization.

2011942309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336759.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2011942309 is about 44854.6799007640. The cubic root of 2011942309 is about 1262.4238027927.

The spelling of 2011942309 in words is "two billion, eleven million, nine hundred forty-two thousand, three hundred nine".