2420309 has 2 divisors, whose sum is σ = 2420310. Its totient is φ = 2420308.

The previous prime is 2420291. The next prime is 2420321. The reversal of 2420309 is 9030242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1697809 + 722500 = 1303^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 2420309 - 2¹⁶ = 2354773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2420339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210154 + 1210155.

It is an arithmetic number, because the mean of its divisors is an integer number (1210155).

2^2420309 is an apocalyptic number.

It is an amenable number.

2420309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2420309 is an equidigital number, since it uses as much as digits as its factorization.

2420309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2420309 is about 1555.7342318018. The cubic root of 2420309 is about 134.2631829127.

The spelling of 2420309 in words is "two million, four hundred twenty thousand, three hundred nine".