340433309 has 2 divisors, whose sum is σ = 340433310. Its totient is φ = 340433308.

The previous prime is 340433299. The next prime is 340433311. The reversal of 340433309 is 903334043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331130809 + 9302500 = 18197^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 340433309 - 2⁴ = 340433293 is a prime.

Together with 340433311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340433329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170216654 + 170216655.

It is an arithmetic number, because the mean of its divisors is an integer number (170216655).

Almost surely, 2^340433309 is an apocalyptic number.

It is an amenable number.

340433309 is a deficient number, since it is larger than the sum of its proper divisors (1).

340433309 is an equidigital number, since it uses as much as digits as its factorization.

340433309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 29.

The square root of 340433309 is about 18450.8349133583. The cubic root of 340433309 is about 698.2495782401.

The spelling of 340433309 in words is "three hundred forty million, four hundred thirty-three thousand, three hundred nine".