2940309 has 6 divisors (see below), whose sum is σ = 4247126. Its totient is φ = 1960200.

The previous prime is 2940277. The next prime is 2940313. The reversal of 2940309 is 9030492.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 459684 = 1575^2 + 678^2 .

It is not a de Polignac number, because 2940309 - 2⁵ = 2940277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2940409) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 163342 + ... + 163359.

2^2940309 is an apocalyptic number.

It is an amenable number.

2940309 is a deficient number, since it is larger than the sum of its proper divisors (1306817).

2940309 is a wasteful number, since it uses less digits than its factorization.

2940309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326707 (or 326704 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2940309 is about 1714.7329238106. The cubic root of 2940309 is about 143.2619938241.

It can be divided in two parts, 2940 and 309, that added together give a square (3249 = 57²).

The spelling of 2940309 in words is "two million, nine hundred forty thousand, three hundred nine".