340738789 has 2 divisors, whose sum is σ = 340738790. Its totient is φ = 340738788.

The previous prime is 340738759. The next prime is 340738819. The reversal of 340738789 is 987837043.

It is a balanced prime because it is at equal distance from previous prime (340738759) and next prime (340738819).

It can be written as a sum of positive squares in only one way, i.e., 206410689 + 134328100 = 14367^2 + 11590^2 .

It is an emirp because it is prime and its reverse (987837043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340738789 - 2¹⁵ = 340706021 is a prime.

It is a super-2 number, since 2×340738789² = 232205844658373042, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340738709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170369394 + 170369395.

It is an arithmetic number, because the mean of its divisors is an integer number (170369395).

Almost surely, 2^340738789 is an apocalyptic number.

It is an amenable number.

340738789 is a deficient number, since it is larger than the sum of its proper divisors (1).

340738789 is an equidigital number, since it uses as much as digits as its factorization.

340738789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 340738789 is about 18459.1112732981. Note that the first 3 decimals coincide. The cubic root of 340738789 is about 698.4583685347.

The spelling of 340738789 in words is "three hundred forty million, seven hundred thirty-eight thousand, seven hundred eighty-nine".