240202309 has 2 divisors, whose sum is σ = 240202310. Its totient is φ = 240202308.

The previous prime is 240202253. The next prime is 240202337. The reversal of 240202309 is 903202042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122544900 + 117657409 = 11070^2 + 10847^2 .

It is a cyclic number.

It is not a de Polignac number, because 240202309 - 2⁷ = 240202181 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 240202309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240202709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120101154 + 120101155.

It is an arithmetic number, because the mean of its divisors is an integer number (120101155).

Almost surely, 2^240202309 is an apocalyptic number.

It is an amenable number.

240202309 is a deficient number, since it is larger than the sum of its proper divisors (1).

240202309 is an equidigital number, since it uses as much as digits as its factorization.

240202309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 240202309 is about 15498.4615042913. The cubic root of 240202309 is about 621.6210691215.

The spelling of 240202309 in words is "two hundred forty million, two hundred two thousand, three hundred nine".