2140309 has 2 divisors, whose sum is σ = 2140310. Its totient is φ = 2140308.

The previous prime is 2140301. The next prime is 2140337. The reversal of 2140309 is 9030412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 908209 = 1110^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140309 - 2³ = 2140301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2140301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070154 + 1070155.

It is an arithmetic number, because the mean of its divisors is an integer number (1070155).

2^2140309 is an apocalyptic number.

It is an amenable number.

2140309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140309 is an equidigital number, since it uses as much as digits as its factorization.

2140309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2140309 is about 1462.9794940463. The cubic root of 2140309 is about 128.8720763786.

The spelling of 2140309 in words is "two million, one hundred forty thousand, three hundred nine".